Update checkout and setup-java github actions to v4 (#260)

Author: Philippus

.github/workflows/ci.yml

@@ -16,11 +16,11 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.event_name != 'schedule' }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - uses: coursier/cache-action@v6
-    - uses: actions/setup-java@v3
+    - uses: actions/setup-java@v4
       with:
         distribution: temurin
         java-version: ${{matrix.java}}
@@ -41,11 +41,11 @@ jobs:
            && contains(github.event.pull_request.body, '[test-rc]')
          )"
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - uses: coursier/cache-action@v6
-    - uses: actions/setup-java@v3
+    - uses: actions/setup-java@v4
       with:
         distribution: temurin
         java-version: ${{matrix.java}}

.github/workflows/release.yml

@@ -6,10 +6,10 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - uses: actions/setup-java@v2
+      - uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 8