Bump mattnotmitt/doxygen-action from 1.9.8 to 1.12.0

Bumps [mattnotmitt/doxygen-action](https://github.com/mattnotmitt/doxygen-action) from 1.9.8 to 1.12.0.
- [Release notes](https://github.com/mattnotmitt/doxygen-action/releases)
- [Commits](mattnotmitt/doxygen-action@cbe72c8...b84fe17)

---
updated-dependencies:
- dependency-name: mattnotmitt/doxygen-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build-sphinx.yml

@@ -180,7 +180,7 @@ jobs:
 
       # https://github.com/marketplace/actions/doxygen-action
       - name: Build backend docs
-        uses: mattnotmitt/doxygen-action@cbe72c8e402e8a3faa1f0b247ef90aa6c8e4ce74 # v1.9.8
+        uses: mattnotmitt/doxygen-action@b84fe17600245bb5db3d6c247cc274ea98c15a3b # v1.12
         with:
             working-directory: 'dpnp/backend/doc'