change build system to pull favicon on docs build instead of embedding

Author: ChristopherJTrent

.github/workflows/doxygen.yml

@@ -19,6 +19,9 @@ jobs:
           submodules: recursive
       - name: Configure Pages
         uses: actions/configure-pages@v5.0.0
+      - run: |
+          mkdir ./assets
+          curl -o ./assets/favicon.png "https://raidcore.gg/favicon.png"
       - name: Build Doxygen
         uses: mattnotmitt/doxygen-action@1.12.0
       - name: Upload Artifact