Bump actions/upload-artifact from 3 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

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

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

.github/workflows/merge.yml

@@ -90,7 +90,7 @@ jobs:
             EGERIA_VERSION=${{ env.EGERIA_VERSION }}
       # --
       - name: Upload Connector
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           # TODO: merge - Update name & artifacts to upload
           name: Jar

.github/workflows/release.yml

@@ -71,7 +71,7 @@ jobs:
             EGERIA_VERSION=${{ env.EGERIA_VERSION }}
       # Upload the library so that build results can be viewed
       - name: Upload Connector
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           # TODO: release - Update name & artifacts to upload
           name: Jar

.github/workflows/verify.yml

@@ -23,7 +23,7 @@ jobs:
         run: ./gradlew build
       # --
       - name: Upload Connector
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Strimzi Integration Connector
           path: '**/build/libs/*.jar'