Work around failures on platforms where the number of files open at once is limited

Author: kit-ty-kate

action.yml

@@ -36,7 +36,7 @@ inputs:
   cache-prefix:
     description: The prefix of the cache keys.
     required: false
-    default: v1
+    default: v3
   github-token:
     description: DO NOT SET THIS.
     required: false