Hotfix latexmx builder to ignore error codes

Author: ericholscher

readthedocs/doc_builder/backends/sphinx.py

@@ -474,7 +474,8 @@ def _build_latexmk(self, cwd, latex_cwd):
 
             # FIXME: check for platex here as well
             '-pdfdvi' if self.project.language == 'ja' else '-pdf',
-
+            # Ignore error codes because they often lie
+            '-f',
             '-dvi-',
             '-ps-',
             f'-jobname={self.project.slug}',