ci: bump CI actions (#6666)

* chore: bump `peter-evans/create-pull-request`

* chore: bump `actions/checkout`

Breaking changes:
- Bump Node.js runtime to version 20

* chore: bump `actions/*-artifact`

Breaking changes: See https://github.com/actions/download-artifact/releases/tag/v4.0.0

* chore: bump `actions/cache`

Breaking changes:
- Bump Node.js runtime to version 20

* chore: bump `actions/setup-java`

Breaking changes:
- Bump Node.js runtime to version 20

* chore: bump `gradle/gradle-build-action`

Breaking changes:
- Remove the gradle-executable input parameter

* chore: trigger CI

* Revert "chore: trigger CI"

This reverts commit 9f9987f201.

.github/workflows/webapp.yml

@@ -21,7 +21,7 @@ jobs:
       update-generated-files: ${{ steps.check-diffs.outputs.web-changed == '1' && steps.check-main-push.outputs.is-main-push == '1'}}
     steps:
       - name: Get source
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 2 # >1 needed for merge base
       - name: Check push-to-main
@@ -58,7 +58,7 @@ jobs:
     if: ${{ needs.decide-what-jobs-to-run.outputs.test-style == 'true' }}
     steps:
       - name: Get source
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Get dependencies
         run: |
           set -e # abort if any command fails
@@ -79,7 +79,7 @@ jobs:
           echo ===
           set -e # undo set +e
       - name: Upload diffs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: ${{ steps.check-for-diffs.outputs.differs == '1' }}
         with:
           name: code-style.diff
@@ -98,7 +98,7 @@ jobs:
     if: ${{ needs.decide-what-jobs-to-run.outputs.test-generated-files == 'true' }}
     steps:
       - name: Get source
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 2 # >1 needed for merge base
       - name: Check for changes to generated files
@@ -131,7 +131,7 @@ jobs:
           set -e # abort if any command fails
           sudo apt-get install -y npm
       - name: Get source
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 2 # >1 needed for merge base
       - name: Generate webapp files
@@ -143,7 +143,7 @@ jobs:
           git diff --name-only
           git add --update web
       - name: Create pull request
-        uses: peter-evans/create-pull-request@v4
+        uses: peter-evans/create-pull-request@v6
         with:
           branch: 'chore/update-webapp-files'
           commit-message: 'chore: update generated transmission-web files'