DOC: Add SSLCertVerificationError warning message for documentation b… (#62015)

Author: jeffersbaxter

doc/source/development/contributing_documentation.rst

@@ -157,6 +157,11 @@ If you want to do a full clean build, do::
     python make.py clean
     python make.py html
 
+.. tip::
+  If ``python make.py html`` exits with an error status,
+  try running the command ``python make.py html --num-jobs=1``
+  to identify the cause of the error.
+
 You can tell ``make.py`` to compile only a single section of the docs, greatly
 reducing the turn-around time for checking your changes.