Remove x64 from doxygen

Author: gorogoro123

.github/workflows/doxygen.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        BuildPlatform: [Win32, x64]
+        BuildPlatform: [Win32]
         Configuration: [Release]
     env:
       BuildPlatform: ${{ matrix.BuildPlatform }}