chore(deps): update actions/checkout action to v6

Author: gabe565-renovate[bot]

.github/workflows/release.yaml

@@ -31,7 +31,7 @@ jobs:
           private-key: ${{ secrets.BOT_APP_PRIVATE_KEY }}
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           fetch-depth: 0
 
@@ -105,7 +105,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           fetch-depth: 0
 
@@ -152,7 +152,7 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
     steps:
       - name: Checkout Helm index
-        uses: actions/checkout@v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           path: helm-index
           ref: refs/heads/helm-index

.github/workflows/renovate.yaml

@@ -24,7 +24,7 @@ jobs:
           private-key: ${{ secrets.BOT_APP_PRIVATE_KEY }}
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           token: ${{ steps.app-token.outputs.token }}
           fetch-depth: 0