chore: bump actions/checkout from 6 to 7 (#1264)

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/after-push-to-branch.yaml

@@ -26,7 +26,7 @@ jobs:
       packages: write
       contents: read
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
     - uses: kptdev/porch/.github/actions/setup-go-kpt@main
       with:
         go-version-file: documentation/go.mod

.github/workflows/after-tag-with-version.yaml

@@ -27,7 +27,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup Go
         uses: kptdev/porch/.github/actions/setup-go-kpt@main

.github/workflows/ci.yaml

@@ -45,7 +45,7 @@ jobs:
         platform: [ubuntu-latest]
     runs-on: ${{ matrix.platform }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Lint shell scripts, ignoring third-party files
         run: |
           find . -name "*.sh" > shell_files.out
@@ -54,7 +54,7 @@ jobs:
   validate-metadata:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Set up Go
         uses: kptdev/porch/.github/actions/setup-go-kpt@main
         with:
@@ -66,7 +66,7 @@ jobs:
   go-unit-test-ci:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Set up Go
         uses: kptdev/porch/.github/actions/setup-go-kpt@main
         with:
@@ -84,7 +84,7 @@ jobs:
       GOPATH: /home/runner/work/krm-functions-catalog/functions/go
       GO111MODULE: on
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Set up Go and install kpt
         uses: kptdev/porch/.github/actions/setup-go-kpt@main
         with:

.github/workflows/release.yaml

@@ -26,7 +26,7 @@ jobs:
     name: function-release
     steps:
     - name: Checkout
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
     - name: Create Short Tag for Function Release
       # Create secondary short tag, e.g. functions/go/apply-setters/v1.1.1 -> apply-setters/v1.1.1
       run: |