Update build.yml (#44)

Author: robinsonzimmermann

.github/workflows/build.yml

@@ -18,9 +18,9 @@ jobs:
         restore-keys: |
           ${{ runner.os }}-gems-
     - name: Set up Ruby 2.6
-      uses: actions/setup-ruby@v1
+      uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.6.x
+        ruby-version: 2.6.10
     - name: Bundle install
       run: |
         gem install bundler:2.2.12