fix(github): fix changesets workflow: run yarn, not uses yarn (#3027)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

.github/workflows/changesets.yml

@@ -11,7 +11,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Install Dependencies
-        uses: yarn
+        run: yarn
 
       - name: Changeset Status
         run: npx changeset status