build(deps): bump actions/checkout from 2 to 3 (#2444)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...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/backport.yml

@@ -8,7 +8,7 @@ jobs:
     if: github.repository_owner == 'freifunk-gluon' && github.event.pull_request.merged == true && (github.event_name != 'labeled' || startsWith('backport', github.event.label.name))
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Create backport PRs

.github/workflows/build-docs.yml

@@ -14,7 +14,7 @@ jobs:
     name: docs
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Install Dependencies
         run: sudo pip3 install sphinx-rtd-theme
       - name: Build documentation

.github/workflows/build-gluon.yml

@@ -14,7 +14,7 @@ jobs:
     outputs:
       targets: ${{ steps.filter.outputs.changes }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       # Filter targets based on changed files
       - uses: dorny/paths-filter@v2
@@ -32,7 +32,7 @@ jobs:
         target: ${{ fromJSON(needs.changed.outputs.targets) }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Install Dependencies
         run: sudo contrib/actions/install-dependencies.sh

.github/workflows/check-patches.yml

@@ -17,7 +17,7 @@ jobs:
     name: Check patches
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Refresh patches
         run: make refresh-patches GLUON_SITEDIR="contrib/ci/minimal-site"
       - name: Show diff

.github/workflows/lint.yml

@@ -8,7 +8,7 @@ jobs:
     name: Lua
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Install Dependencies
         run: sudo apt-get -y update && sudo apt-get -y install lua-check
       - name: Install example site
@@ -20,7 +20,7 @@ jobs:
     name: Shell
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Install Dependencies
         run: sudo apt-get -y update && sudo apt-get -y install shellcheck
       - name: Install example site