another try for opencv dir

Author: ponchio

.github/workflows/BuildRelight.yml

@@ -51,7 +51,7 @@ jobs:
       run: |
         choco install opencv -y
         echo "OpenCV installed at C:\tools\opencv\build"
-        echo ("OpenCV_DIR=C:\tools") >> $env:GITHUB_ENV
+        echo ("OpenCV_DIR=C:\tools\opencv\build\x64\vc16\lib") >> $env:GITHUB_ENV
         echo ("QT_VERSION=6.6.*") >> $env:GITHUB_ENV
 
     - name: Install Qt