fix: fix indent in action.yml

Author: zydou

action.yml

@@ -12,7 +12,7 @@ inputs:
   work_in_root_file_dir:
     description: Change directory into each root file's directory before compiling each documents
   continue_on_error:
-     description: Continuing to build document even with LaTeX build errors
+    description: Continuing to build document even with LaTeX build errors
   compiler:
     description: The LaTeX engine to be invoked
     default: latexmk