ren cannot accept full path

Author: mvorisek

.github/scripts/windows/build_task.bat

@@ -24,8 +24,10 @@ if %errorlevel% neq 0 exit /b 3
 if /i "%APPVEYOR%" equ "True" rmdir /s /q c:\OpenSSL-v11-Win64 >NUL 2>NUL
 if %errorlevel% neq 0 exit /b 3
 rem rmdir takes several minutes rename instead only
-if /i "%GITHUB_ACTIONS%" equ "True" ren "C:\msys64" "C:\trash-msys64"
+pushd C:\
+if /i "%GITHUB_ACTIONS%" equ "True" ren msys64 msys64-del
 if %errorlevel% neq 0 exit /b 3
+popd
 del /f /q C:\Windows\System32\libcrypto-1_1-x64.dll >NUL 2>NUL
 if %errorlevel% neq 0 exit /b 3
 del /f /q C:\Windows\System32\libssl-1_1-x64.dll >NUL 2>NUL