chore(CI): Don't try to upload installer on debug builds

The installer is only built on release builds. We used to ignore failure to
upload prior to 5fcf86b521. We stopped ignoring
because a07ab89cc8 tried to make our upload
targetted, but it only resolved the issue for the zip, not the installer.

.github/workflows/build-test-deploy.yaml

@@ -345,6 +345,7 @@ jobs:
       - name: Run build
         run: docker-compose run --rm windows_builder ./windows/cross-compile/build.sh --arch x86_64 --build-type ${{ matrix.build_type }} --run-tests --src-dir /qtox
       - name: Upload installer
+        if: matrix.build_type == 'release'
         uses: actions/upload-artifact@v2
         with:
           name: setup-qtox-x86_64-${{ matrix.build_type }}.exe
@@ -405,6 +406,7 @@ jobs:
       - name: Run build
         run: docker-compose run --rm windows_builder.i686 ./windows/cross-compile/build.sh --arch i686 --build-type ${{ matrix.build_type }} --run-tests --src-dir /qtox
       - name: Upload installer
+        if: matrix.build_type == 'release'
         uses: actions/upload-artifact@v2
         with:
           name: setup-qtox-i686-${{ matrix.build_type }}.exe