.redirects-cache_en_ja.json should not be checked in (#25537)

* .redirects-cache_en_ja.json should not be checked in

* still ignore

Co-authored-by: Mike Surowiec <[email protected]>

Author: peterbe

.gitignore

@@ -17,6 +17,9 @@ blc_output.log
 blc_output_internal.log
 broken_links.md
 lib/redirects/.redirects-cache.json
+# This one is purely for historical reasons because so many people might
+# still have thes files on their disk.
+lib/redirects/.redirects-cache_*.json
 
 # During the preview deploy untrusted user code may be cloned into this directory
 # We ignore it from git to keep things deterministic