Update actions/checkout action to v7

Update actions/checkout from v6.1.0 to v7.0.1

Change-type: patch

Author: balena-renovate[bot]

.github/workflows/meta-balena-esr.yml

@@ -80,7 +80,7 @@ jobs:
           owner: ${{ github.repository_owner }}
           repositories: ${{ github.event.repository.name }}
 
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
         with:
           # The default GITHUB_TOKEN does not have workflow scope
           # This is needed to push a new branch with workflow files

.github/workflows/update-backports.yml

@@ -38,7 +38,7 @@ jobs:
           repositories: >
             ["${{ github.event.repository.name }}"]
 
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
         with:
           # The default GITHUB_TOKEN does not have workflow scope
           # This is needed to push a new branch with workflow files