Update actions/cache action to v5.0.4

Author: renovate[bot]

.github/workflows/testing.yml

@@ -49,7 +49,7 @@ jobs:
           fetch-depth: 0
 
       - name: Cache go module
-        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
         with:
           path: |
             ~/.cache/go-build