Merge branch 'main' into clarify-environment-marker-comparisons

Author: ncoghlan

.github/workflows/test.yml

@@ -25,11 +25,18 @@ jobs:
     if: ${{ github.repository_owner == 'pypa' || github.event_name != 'schedule' }}
     runs-on: ubuntu-latest
     timeout-minutes: 20
+    continue-on-error: >-
+      ${{ fromJSON(matrix.continue-on-error) }}
     strategy:
       matrix:
         noxenv:
         - build
-        - linkcheck
+        continue-on-error:
+        - false
+        include:
+        - noxenv: linkcheck
+          continue-on-error: >-  # Don't block PRs on linkcheck unrelated failures
+            ${{ toJSON(github.event_name == 'pull_request') }}
 
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
@@ -50,7 +57,7 @@ jobs:
       - name: Nox ${{ matrix.noxenv }}
         env:
           # Authenticate github.com requests during linkcheck to avoid rate limits.
-          GITHUB_TOKEN: ${{ github.token }}
+          GITHUB_TOKEN: ${{ matrix.noxenv == 'linkcheck' && github.token || '' }}
         run: |
           python -m nox -s ${{ matrix.noxenv }}