Bump actions/upload-artifact from 5 to 6 in the actions group (#2)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -33,7 +33,7 @@ jobs:
         run: ./gradlew build
 
       - name: Upload Plugin Artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: plugin
           path: build/libs/*.jar

.github/workflows/publish.yml

@@ -30,7 +30,7 @@ jobs:
         run: ./gradlew build
 
       - name: Upload Plugin Artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: plugin
           path: build/libs/*.jar