Update release notes

RELEASENOTES.md

@@ -115,55 +115,13 @@ The latter links can be used for OTA upgrades too like ``OtaUrl https://ota.tasm
 
 [Complete list](BUILDS.md) of available feature and sensors.
 
-## Changelog v15.4.0 Sybil
+## Changelog v15.4.0.1
 ### Added
-- Support for JSON value pair `"ARCH"` in template being either ESP8266, ESP32, ESP32C2, ESP32C3, ESP32C5, ESP32C6, ESP32H2, ESP32H4, ESP32P4, ESP32S2 or ESP32S3
-- Support for Sensirion SCD42 and SCD43 CO2 sensor
-- Support for Sensirion STCC4 CO2 sensor
-- Shelly Pro EM-50 template {"NAME":"Shelly Pro EM-50","ARCH":"ESP32","GPIO":[0,0,224,0,3457,0,0,0,0,608,544,640,9472,0,5600,0,0,0,0,5568,0,0,0,0,0,0,0,0,5536,0,0,32,4736,0,0,0],"FLAG":0,"BASE":1,"CMND":"AdcGpio36 10000,10000,3350"} [#24604](https://github.com/arendst/Tasmota/issues/24604)
-- ESP8266 redesigned I2C Wire driver to support second I2C bus
-- Drivers PCA9685 and PCF8574 multi I2C bus support
-- Environment sensors CCS811, SCD30, SGP30 and SGP40 multi I2C bus support
-- Real Time Clocks BM8563, PCF85063 and PCF85363 multi I2C bus support
-- LCD multi I2C bus support
-- I2S full duplex, auto rx sample rate [#24469](https://github.com/arendst/Tasmota/issues/24469)
-- Sen5x power on delay of 60ms [#24452](https://github.com/arendst/Tasmota/issues/24452)
-- Berry solidification is now part of the build system [#24664](https://github.com/arendst/Tasmota/issues/24664)
-- Berry add `loglevel` to `mqtt.publish()` [#24551](https://github.com/arendst/Tasmota/issues/24551)
 
 ### Breaking Changed
-- Renamed SCD40 sensors to their real names like SCD40 to SCD43
 
 ### Changed
-- ESP8266 platform update from 2026.02.00 to 2026.04.00 [#24635](https://github.com/arendst/Tasmota/issues/24635)
-- ESP32 Platform from 2025.02.30 to 2026.04.30, Framework (Arduino Core) from v3.1.9 to v3.1.11 and IDF from v5.3.4.251226 to v5.3.4.260127 [#24635](https://github.com/arendst/Tasmota/issues/24635)
-- ESP32-C5/C6/P4 Platform from 2025.03.30 to 2026.04.50, Framework (Arduino Core) from v3.1.10 to v3.3.8 and IDF from v5.3.4.260127 to v5.5.4.260407  [#24635](https://github.com/arendst/Tasmota/issues/24635)
-- Adafruit_BusIO library from v1.11.0 to v1.17.4
-- Adafruit_CCS811 library from v1.0.0.14 to v1.1.3
-- Adafruit SGP30 library from v1.2.0 to v2.0.3
-- Adafruit SGP40 library from v1.1.0 to v1.1.4
-- Sensirion Core library from v0.6.0 to v0.7.2
-- LVGL library from v9.4.0 to v9.5.0 [#24470](https://github.com/arendst/Tasmota/issues/24470)
-- SHT1x software reset I2C bus after initial (un)detection
-- NeoPool always output valid sensitive data [#24573](https://github.com/arendst/Tasmota/issues/24573)
-- SML suppress MQTT publish until valid meter data received [#24587](https://github.com/arendst/Tasmota/issues/24587)
-- Berry faster compilation [#24656](https://github.com/arendst/Tasmota/issues/24656)
-- Matter improved parameters handling [#24471](https://github.com/arendst/Tasmota/issues/24471)
 
 ### Fixed
-- ESP8266 heap drain and exception 29 when DHCP provides NTP server [#24515](https://github.com/arendst/Tasmota/issues/24515), [#24566](https://github.com/arendst/Tasmota/issues/24566)
-- Crash when shutting down Wifi with `Wifi 0` [#24536](https://github.com/arendst/Tasmota/issues/24536)
-- Don't send extraneous `0\r\n\r\n` with non-chunked HTTP/1.0 [#24518](https://github.com/arendst/Tasmota/issues/24518)
-- Shelly Dimmer 2 serial timeout regression from v15.2.0.1 [#24560](https://github.com/arendst/Tasmota/issues/24560)
-- NeoPool possible IntegerDivideByZero [#24578](https://github.com/arendst/Tasmota/issues/24578)
-- Mitsubishi Electric HVAC memory leak and other issues for MiElHVAC [#24660](https://github.com/arendst/Tasmota/issues/24660)
-- File upload improvements: `/ufsu` api mode, no interrupts disabling, cleaner confirmation page [#24521](https://github.com/arendst/Tasmota/issues/24521)
-- Do not free BT memory when in use [#24480](https://github.com/arendst/Tasmota/issues/24480)
-- I2S mkv muxing for files [#24666](https://github.com/arendst/Tasmota/issues/24666)
-- Berry avoid `tasmota.wifi()` returning bad values when wifi is turned off [#24505](https://github.com/arendst/Tasmota/issues/24505)
-- Berry crash when comparing for equality float literals on ESP32 [#24610](https://github.com/arendst/Tasmota/issues/24610)
 
 ### Removed
-- ESP8266 I2C Slave support which was never used by Tasmota anyway
-- Berry `tasmota.urlbecload()` superseded by Extension Manager [#24493](https://github.com/arendst/Tasmota/issues/24493)
-- Berry remove `mdns.stop()` [#24549](https://github.com/arendst/Tasmota/issues/24549)