Bump Jimver/cuda-toolkit from 0.2.18 to 0.2.21

Bumps [Jimver/cuda-toolkit](https://github.com/jimver/cuda-toolkit) from 0.2.18 to 0.2.21.
- [Release notes](https://github.com/jimver/cuda-toolkit/releases)
- [Commits](Jimver/cuda-toolkit@v0.2.18...v0.2.21)

---
updated-dependencies:
- dependency-name: Jimver/cuda-toolkit
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/root-cmakelists.yaml

@@ -393,7 +393,7 @@ jobs:
 
           msystem: UCRT64
 
-      - uses: Jimver/[email protected].18
+      - uses: Jimver/[email protected].21
         name: install CUDA toolkit
         if: matrix.cuda == 'with'
         id: cuda-toolkit