ci: fix the test name for upgrade suite

Since we were pointing at CephUpgradeSuite test only this was running
all the tests and thus some resources were created by other tests.
Let's just run the test we need.

Closes: rook#8843
Signed-off-by: Sébastien Han <seb@redhat.com>

.github/workflows/integration-tests-on-release.yaml

@@ -194,7 +194,7 @@ jobs:
     - name: TestCephUpgradeSuite
       run: |
        export DEVICE_FILTER=$(lsblk|awk '/14G/ {print $1}'| head -1)
-       go test -v -timeout 1800s -run CephUpgradeSuite github.com/rook/rook/tests/integration
+       go test -v -timeout 1800s -run CephUpgradeSuite/TestUpgradeRookToMaster github.com/rook/rook/tests/integration
 
     - name: Artifact
       uses: actions/upload-artifact@v2