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

Author: renovate[bot]

.github/workflows/da-release-notes.yaml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Use email bot
         uses: adobecom/da-email-bot@main
         env:

.github/workflows/lint_test.yaml

@@ -14,7 +14,7 @@ jobs:
         node-version: [20.x]
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2