fix doxygen working directory

Author: microdee

.github/workflows/doxygen.yml

@@ -22,7 +22,7 @@ jobs:
         uses: AgarwalSaurav/ghaction-doxygen-ghpages@de7725119570b5d09a5d7872518f9e5cbd8dae8e
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          working-directory: .
-          doxyfile-path: docs/Doxyfile
-          html-output-folder: docs/Doxygen/html
+          working-directory: docs
+          doxyfile-path: Doxyfile
+          html-output-folder: Doxygen/html
           branch: gh-pages