fix error build

HaoXuan40404 · HaoXuan40404 · commit 59cfc1bef42c · 2020-10-29T15:52:38.000+08:00
diff --git a/requirements.txt b/requirements.txt
@@ -8,4 +8,4 @@ sphinxcontrib-mermaid > 0.3
 recommonmark > 0.4.0
 sphinx-notfound-page == 0.1
 commonmarkextensions == 0.0.4
-commonmark > 0.8.0
+commonmark == 0.8.0
