update readme

Author: JusterZhu

git_push.bat

@@ -16,15 +16,15 @@ if %errorlevel% neq 0 (
     exit /b %errorlevel%
 )
 
-echo Pushing to upstream remote on 'main' branch...
+echo Pushing to upstream remote on 'master' branch...
 git push upstream master
 if %errorlevel% neq 0 (
     echo Failed to push to upstream remote on 'main' branch.
     pause
     exit /b %errorlevel%
 )
 
-echo Pushing to 'upstream_gitcode' remote on 'main' branch...
+echo Pushing to 'upstream_gitcode' remote on 'master' branch...
 git push upstream_gitcode master
 if %errorlevel% neq 0 (
     echo Failed to push to 'upstream_gitcode' remote on 'main' branch.