remove microshift temp files

Author: jawnsy

Diff for: .github/workflows/build.yml

@@ -133,6 +133,9 @@ jobs:
       - name: Start MicroShift cluster
         uses: container-tools/[email protected]
 
+      - name: Remove microshift temporary files
+        run: rm microshift-ubuntu.tar.xz release.sha256
+
       - name: Show environment data
         run: |
           set -x