Merge pull request #24638 from miaoyq/fix-docs-err

Delete  redundant content of 'docs/extend/plugins.md'

docs/extend/plugins.md

@@ -34,7 +34,7 @@ Follow the instructions in the plugin's documentation.
 The sections below provide an inexhaustive overview of available plugins.
 
 <style>
-#content tr td:first-child { white-space: nowrap;}
+#DocumentationText  tr td:first-child { white-space: nowrap;}
 </style>
 
 ### Network plugins