Update .github/workflows/README.adoc

Co-authored-by: Björn Kautler <[email protected]>

.github/workflows/README.adoc

@@ -90,7 +90,7 @@ you either need to also change the importing file, or to properly execute the sc
 you need to delete the stale entry from the compilation cache which can be found here:
 
 - On Windows the default location is at `%LOCALAPPDATA%\main.kts.compiled.cache\`.
-- On Linux the default location is at `~/.cache/main.kts.compiled.cache/`.
+- On Linux the default location is at `$XDG_CACHE_HOME/main.kts.compiled.cache/` or `~/.cache/main.kts.compiled.cache/`.
 - On macOS the default location is at `~/Library/Caches/main.kts.compiled.cache/`.
 
 Alternatively, you can also delete the whole cache directory.