Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build-chocolatey.yml

@@ -27,7 +27,7 @@ jobs:
   build:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Replace the version placeholder
         uses: richardrigutins/replace-in-files@v2
         with:

.github/workflows/build-msi.yml

@@ -21,7 +21,7 @@ jobs:
   build:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           distribution: 'adopt'

.github/workflows/build-sdk.yml

@@ -55,7 +55,7 @@ jobs:
     env:
       DEVELOCITY_ACCESS_KEY: ${{ secrets.DEVELOCITY_ACCESS_KEY }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           distribution: temurin

.github/workflows/ci.yaml

@@ -69,7 +69,7 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Git Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Test
         run: sbt ";scala3-bootstrapped-new/compile ;scala3-compiler-bootstrapped-new/test"
@@ -107,13 +107,13 @@ jobs:
           git -c "http.https://github.com/.extraheader=" fetch --recurse-submodules=no "https://github.com/scala/scala3" && git reset --hard FETCH_HEAD || true
 
       - name: Checkout cleanup script
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Cleanup
         run: .github/workflows/cleanup.sh
 
       - name: Git Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Add SBT proxy repositories
         run: cp -vf .github/workflows/repositories /root/.sbt/ ; true

.github/workflows/dependency-graph.yml

@@ -8,7 +8,7 @@ jobs:
     name: Update Dependency Graph
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: sbt/setup-sbt@v1
       - uses: scalacenter/sbt-dependency-submission@v3
         env:

.github/workflows/language-reference.yaml

@@ -24,7 +24,7 @@ jobs:
         run: echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
 
       - name: Git Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           path: 'dotty'
           fetch-depth: 0
@@ -49,7 +49,7 @@ jobs:
 
       - name: Push changes to scala3-reference-docs
         if: github.event_name == 'push'
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: lampepfl/scala3-reference-docs
           fetch-depth: 0

.github/workflows/lts-backport.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - uses: coursier/cache-action@v7

.github/workflows/release-maven-artifacts.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     environment: ${{ inputs.environment }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           distribution: 'adopt'

.github/workflows/scaladoc.yaml

@@ -28,7 +28,7 @@ jobs:
 
     steps:
       - name: Git Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up JDK 17
         uses: actions/setup-java@v5
@@ -75,7 +75,7 @@ jobs:
 
     steps:
       - name: Git Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up JDK 17
         uses: actions/setup-java@v5

.github/workflows/spec.yml

@@ -25,7 +25,7 @@ jobs:
         working-directory: ./docs/_spec
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       # Keep in sync with ./docs/_spec/Dockerfile
       - uses: ruby/setup-ruby@v1