jedi: Fallback to tomllib backport.

jedi/build.py

@@ -7,9 +7,13 @@ import pathlib
 import shutil
 import subprocess
 import sys
-import tomllib
 import zipfile
 
+try:
+    import tomllib
+except ImportError:
+    import tomli as tomllib  # type: ignore[no-redef]
+
 if len(sys.argv) != 2:
     print(f"Usage: {sys.argv[0]} <version>", file=sys.stderr)
     sys.exit(1)