Update dart.yml

Change to sentence fragment case for the step names

ci/dart.yml

@@ -20,22 +20,22 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: dart --version
+      - name: Print Dart SDK version
         run: dart --version
 
-      - name: dart pub get
+      - name: Install dependencies
         run: dart pub get
 
       # Uncomment this step to verify the use of 'dart format' on each commit.
-      # - name: dart format
+      # - name: Verify formatting
       #   run: dart format --output=none --set-exit-if-changed .
 
       # Consider passing '--fatal-infos' for slightly stricter analysis.
-      - name: dart analyze
+      - name: Analyze project source
         run: dart analyze
 
       # Your project will need to have tests in test/ and a dependency on
       # package:test for this step to succeed. Note that Flutter projects will
       # want to change this to 'flutter test'.
-      - name: dart test
+      - name: Run tests
         run: dart test