🔨 update yarn install command for newer yarn version

Author: troberts-28

.github/workflows/unit-test.yml

@@ -21,6 +21,6 @@ jobs:
         node-version: 20
         registry-url: https://registry.npmjs.org
     - name: Install dependencies
-      run: yarn install -D
+      run: yarn install
     - name: Test
       run: yarn test