fix actions/cache version in build-test workflow

Author: amansinghoriginal

.github/workflows/build-test.yml

@@ -349,7 +349,7 @@ jobs:
           go-version: '1.21'
 
       - name: Cache Go modules
-        uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
+        uses: actions/cache@v4
         with:
           path: |
             ~/go/pkg/mod