deps(ci): bump actions/setup-java from 3 to 4

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

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

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

.github/workflows/release.yml

@@ -86,13 +86,13 @@ jobs:
           cache: 'npm'
           cache-dependency-path: komga-webui/package-lock.json
 
-      - uses: actions/setup-java@v3
+      - uses: actions/setup-java@v4
         with:
           java-version: 21
           java-package: 'jdk'
           distribution: 'temurin'
 
-      - uses: actions/setup-java@v3
+      - uses: actions/setup-java@v4
         with:
           java-version: 17
           java-package: 'jdk'

.github/workflows/tests.yml

@@ -15,12 +15,12 @@ jobs:
     name: Test server
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-java@v3
+      - uses: actions/setup-java@v4
         with:
           java-version: 21
           java-package: 'jdk'
           distribution: 'temurin'
-      - uses: actions/setup-java@v3
+      - uses: actions/setup-java@v4
         with:
           java-version: 17
           java-package: 'jdk'