zstandard: address review — drop unused checkouts, ubuntu-latest publish, cp311

- Remove the leftover Checkout python-wheels step in build_wheels (unused).
- Publish job runs on ubuntu-latest (no need for a riscv64 runner).
- Use riseproject-dev/python-wheels/actions/publish-to-gitlab@main and drop the
  publish job's checkout.
- Add cp311 to the build matrix per the updated dev-guide matrix.

Signed-off-by: Bruno Verachten <gounthar@gmail.com>

Author: gounthar

.github/workflows/build-zstandard.yml

@@ -34,15 +34,9 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["cp312", "cp313", "cp314", "cp314t"]
+        python: ["cp311", "cp312", "cp313", "cp314", "cp314t"]
 
     steps:
-      - name: Checkout python-wheels
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
-        with:
-          path: python-wheels-repo
-          persist-credentials: false
-
       # zstandard vendors the zstd C library as a submodule and, unlike numpy,
       # tags releases without a leading `v` (e.g. `0.25.0`), so the ref is the
       # bare version.
@@ -91,17 +85,11 @@ jobs:
     # version. Manual trigger is the only entry point, so checking the ref is
     # enough to gate uploads.
     if: github.ref == 'refs/heads/main'
-    runs-on: ubuntu-24.04-riscv
+    runs-on: ubuntu-latest
     permissions:
       contents: read
 
     steps:
-      - name: Checkout python-wheels
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
-        with:
-          path: python-wheels-repo
-          persist-credentials: false
-
       - name: Download wheels
         uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c  # v8.0.1
         with:
@@ -110,7 +98,7 @@ jobs:
           merge-multiple: true
 
       - name: Publish to GitLab PyPI registry
-        uses: ./python-wheels-repo/actions/publish-to-gitlab
+        uses: riseproject-dev/python-wheels/actions/publish-to-gitlab@main
         with:
           gitlab-username: ${{ vars.GITLAB_DEPLOY_USER }}
           gitlab-token: ${{ secrets.GITLAB_DEPLOY_TOKEN }}