Fix typo in cache-clearing workflow

PiperOrigin-RevId: 595424484

.github/workflows/clear_caches.yml

@@ -3,7 +3,7 @@ name: Clear expensive caches to prevent unbounded growth
 on:
   schedule:
     # Run every 4 months at 10 AM UTC (2 AM PDT)
-    - cron: 0 10 1 */4 *
+    - cron: 0 10 5 */4 *
 
   # manual
   workflow_dispatch:
@@ -31,5 +31,5 @@ jobs:
       - name: Create an empty cache with a single file
         run: |
           rm -rf .repository-cache
-          mkdir -p .repository-cache'
+          mkdir -p .repository-cache
           touch .repository-cache/reset_file