Bump the github-actions group with 2 updates

Bumps the github-actions group with 2 updates: [actions/checkout](https://github.com/actions/checkout) and [actions/setup-java](https://github.com/actions/setup-java).


Updates `actions/checkout` from 3 to 4
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

Updates `actions/setup-java` from 3 to 4
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](actions/setup-java@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/setup-java
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/publish-ayatana-maven.yml

@@ -12,10 +12,10 @@ jobs:
     runs-on: ubuntu-latest
     if: startsWith(github.ref, 'refs/tags/') # only allow publishing tagged versions
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
             ref: 'libayatana-appindicator-full'
-      - uses: actions/setup-java@v3
+      - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
           java-version: 21

.github/workflows/publish-maven.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
             ref: 'develop'
-      - uses: actions/setup-java@v3
+      - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
           java-version: 21

.github/workflows/publish-minimal-maven.yml

@@ -12,10 +12,10 @@ jobs:
     runs-on: ubuntu-latest
     if: startsWith(github.ref, 'refs/tags/') # only allow publishing tagged versions
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
             ref: 'minimal'
-      - uses: actions/setup-java@v3
+      - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
           java-version: 21