Bump actions/setup-dotnet from 1.8.0 to 1.8.1 (#9)

Bumps [actions/setup-dotnet](https://github.com/actions/setup-dotnet) from 1.8.0 to 1.8.1.
- [Release notes](https://github.com/actions/setup-dotnet/releases)
- [Commits](actions/setup-dotnet@v1.8.0...v1.8.1)

---
updated-dependencies:
- dependency-name: actions/setup-dotnet
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -32,11 +32,11 @@ jobs:
     runs-on: ${{ matrix.job.os }}
     steps:
       - name: Setup netcoreapp3.1
-        uses: actions/setup-dotnet@v1.8.0
+        uses: actions/setup-dotnet@v1.8.1
         with:
           dotnet-version: "3.1.407"
       - name: Setup net5.0
-        uses: actions/setup-dotnet@v1.8.0
+        uses: actions/setup-dotnet@v1.8.1
         with:
           dotnet-version: "5.0.201"
       - name: Run dotnet --info