lint.yml in statsd-instrument-3.5.10

- old
+ new

@@ -11,10 +11,10 @@
     - uses: actions/checkout@v1
 
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.6
+        ruby-version: 2.7
         bundler-cache: true
 
     - name: Run Rubocop
       run: bin/rubocop