Regenerate GitHub Actions workflow

Executed command: sbt githubWorkflowGenerate

Author: dwolla-oss-scala-steward[bot]

.github/workflows/ci.yml

@@ -78,7 +78,7 @@ jobs:
 
       - name: Upload target directories
         if: github.event_name != 'pull_request' && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main')
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: target-${{ matrix.os }}-${{ matrix.java }}-${{ matrix.scala }}
           path: targets.tar
@@ -115,7 +115,7 @@ jobs:
         run: sbt +update
 
       - name: Download target directories (per-project-matrix)
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: target-${{ matrix.os }}-${{ matrix.java }}-per-project-matrix