Bump actions/checkout from 4.1.7 to 4.2.1

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.7 to 4.2.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4.1.7...v4.2.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/task_proposal.yaml

@@ -23,7 +23,7 @@ jobs:
           - dev: turing
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@v4.2.1
       - name: Run setup-gear
         uses: ./.github/actions/setup-gear
         with:

.github/workflows/template.yaml

@@ -14,7 +14,7 @@ jobs:
         with:
           app-id: ${{ secrets.ORGBOT_APP_ID }}
           private-key: ${{ secrets.ORGBOT_PRIVATE_KEY }}
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@v4.2.1
         with:
           token: ${{ steps.orgbot.outputs.token }}
           persist-credentials: false

.github/workflows/work_change.yaml

@@ -24,7 +24,7 @@ jobs:
           - dev: turing
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@v4.2.1
       - name: Run setup-gear
         uses: ./.github/actions/setup-gear
         with:

.github/workflows/work_proposal.yaml

@@ -31,7 +31,7 @@ jobs:
           - dev: church
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@v4.2.1
       - name: Run setup-gear
         uses: ./.github/actions/setup-gear
         with:
@@ -88,7 +88,7 @@ jobs:
             ops: commons
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@v4.2.1
       - name: Run setup-gear
         uses: ./.github/actions/setup-gear
         with:
@@ -132,7 +132,7 @@ jobs:
             ops: commons
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@v4.2.1
       - name: Run setup-gear
         uses: ./.github/actions/setup-gear
         with:
@@ -187,7 +187,7 @@ jobs:
     permissions:
       packages: write
     steps:
-      - uses: actions/checkout@v4.1.7
+      - uses: actions/checkout@v4.2.1
       - name: Run setup-gear
         uses: ./.github/actions/setup-gear
         with: