chore(deps): bump actions/checkout, setup-java, upload-artifact

- actions/checkout@v4 → @v6 (PRs #20)
- actions/setup-java@v4 → @v5 (PR #17)
- actions/upload-artifact@v4 → @v7 (PR #19)

Author: nficano

.github/workflows/ci.yml

@@ -38,12 +38,12 @@ jobs:
         # produce green tests on every PR.
         jdk: ["21", "25"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
       - name: Set up JDK ${{ matrix.jdk }}
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
           distribution: temurin
           java-version: ${{ matrix.jdk }}
@@ -99,7 +99,7 @@ jobs:
 
       - name: Upload test reports
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: test-reports-jdk${{ matrix.jdk }}
           path: |
@@ -115,8 +115,8 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-java@v4
+      - uses: actions/checkout@v6
+      - uses: actions/setup-java@v5
         with:
           distribution: temurin
           java-version: "21"