Remove redundant --keep-going when running Sphinx (#133156)

Author: hugovk

.github/workflows/reusable-docs.yml

@@ -66,7 +66,7 @@ jobs:
       run: |
         set -Eeuo pipefail
         # Build docs with the nit-picky option; write warnings to file
-        make -C Doc/ PYTHON=../python SPHINXOPTS="--quiet --nitpicky --fail-on-warning --keep-going --warning-file sphinx-warnings.txt" html
+        make -C Doc/ PYTHON=../python SPHINXOPTS="--quiet --nitpicky --fail-on-warning --warning-file sphinx-warnings.txt" html
     - name: 'Check warnings'
       if: github.event_name == 'pull_request'
       run: |
@@ -101,4 +101,4 @@ jobs:
       run: make -C Doc/ PYTHON=../python venv
     # Use "xvfb-run" since some doctest tests open GUI windows
     - name: 'Run documentation doctest'
-      run: xvfb-run make -C Doc/ PYTHON=../python SPHINXERRORHANDLING="--fail-on-warning --keep-going" doctest
+      run: xvfb-run make -C Doc/ PYTHON=../python SPHINXERRORHANDLING="--fail-on-warning" doctest