Fix zizmor complaint

Author: mbaldessari

.github/workflows/helm-lint.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 

.github/workflows/helm-unittest.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
 

.github/workflows/superlinter.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           # Full git history is needed to get a proper list of changed files within `super-linter`
           fetch-depth: 0