Revert "Pin Task version to 3.9.0" (#73)

This reverts commit 726f78e.

The issue with environment variables on Windows has been fixed with the
release of version 3.9.2.

Author: Giuseppe Lumia

Diff for: .github/workflows/release-go-task.yml

@@ -39,7 +39,7 @@ jobs:
         uses: arduino/setup-task@v1
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
-          version: 3.9.0
+          version: 3.x
 
       - name: Build
         run: task dist:all

Diff for: .github/workflows/test-go-task.yml

@@ -86,7 +86,7 @@ jobs:
         uses: arduino/setup-task@v1
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
-          version: 3.9.0
+          version: 3.x
 
       - name: Run tests
         env: