Use standardized Task install step name in "Test Go" workflow

This is the naming convention established in the standardized template workflow. The tool name is "Task", with
"taskfile" being its configuration file, so the previous step name was inaccurate.

Author: per1234

.github/workflows/test-go-task.yml

@@ -40,7 +40,7 @@ jobs:
         with:
           go-version: ${{ env.GO_VERSION }}
 
-      - name: Install Taskfile
+      - name: Install Task
         uses: arduino/setup-task@v1
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}