CI: bump rocq version

Author: k32

.github/workflows/coqchk.yml

@@ -8,12 +8,12 @@ jobs:
     strategy:
       matrix:
         coq_version:
-          - '8.20'
+          - '9.0.1'
         ocaml_version: ['default']
       fail-fast: true  # don't stop jobs if one fails
     steps:
       - uses: actions/checkout@v3
-      - uses: coq-community/docker-coq-action@v1
+      - uses: rocq-community/docker-coq-action@v1
         with:
           opam_file: 'coq-libtx-storage.opam'
           coq_version: ${{ matrix.coq_version }}