Bump actions/checkout from 1 to 3 (#743)

Bumps [actions/checkout](https://github.com/actions/checkout) from 1 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v1...v3)

---
updated-dependencies:
- dependency-name: actions/checkout
  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>

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Set up QEMU for aarch64 emulation
         if: ${{ matrix.arch != 'x86_64' }}
@@ -55,7 +55,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Lint
         run: io.elementary.vala-lint -d .

.github/workflows/merge.yml

@@ -48,7 +48,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Set up QEMU for aarch64 emulation
         if: ${{ matrix.arch != 'x86_64' }}

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
 
      steps:
        - name: Checkout
-         uses: actions/checkout@v2
+         uses: actions/checkout@v3
 
        - name: Release
          uses: elementary/actions/release@master
@@ -45,7 +45,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Set up QEMU for aarch64 emulation
         if: ${{ matrix.arch != 'x86_64' }}