Bump Bogdanp/setup-racket from 1.10 to 1.11 (#269)

Bumps [Bogdanp/setup-racket](https://github.com/bogdanp/setup-racket) from 1.10 to 1.11.
- [Release notes](https://github.com/bogdanp/setup-racket/releases)
- [Commits](Bogdanp/setup-racket@v1.10...v1.11)

---
updated-dependencies:
- dependency-name: Bogdanp/setup-racket
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/tests.yml

@@ -21,7 +21,7 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: Setup Racket
-        uses: Bogdanp/setup-racket@v1.10
+        uses: Bogdanp/setup-racket@v1.11
         with:
           architecture: x64
           version: ${{ matrix.racket-version }}