rocm 6.2 version bump for CI tests

Author: cazlo

.github/workflows/test.yaml

@@ -114,7 +114,7 @@ jobs:
     strategy:
       matrix:
         rocm-version:
-          - '6.1.2'
+          - '6.2.0'
     runs-on: linux
     container: rocm/dev-ubuntu-20.04:${{ matrix.rocm-version }}
     steps: