[CI] hot fix Sphinx (#9998)

Siyuan Feng · web-flow · commit 589fc01026dc · 2022-01-20T11:10:50.000Z
diff --git a/docs/contribute/git_howto.rst b/docs/contribute/git_howto.rst
@@ -24,7 +24,7 @@ Git Usage Tips
 Here are some tips for git workflow.
 
 How to resolve a conflict with ``main``
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+---------------------------------------
 
 - First rebase to most recent main
 
