Use arduino/setup-task@v1 action for Linux build job

Unfortunately the latest v2 version of the arduino/setup-task action used to install the Task task runner tool in the
runner machine has a dependency on a higher version of glibc than is provided by the Linux container. For this reason,
the workflow is configured to use arduino/setup-task@v1 for the Linux build job.

We will receive pull requests from Dependabot offering to update this outdated action dependency at each subsequent
major version release of the action (which are not terribly frequent). We must decline the bump of the action in that
specific step, but we can accept the bumps of all other usages of the action in the workflows. Dependabot remembers when
you decline a bump so this should not be too bothersome.

.github/workflows/build.yml

@@ -320,11 +320,20 @@ jobs:
           go-version: ${{ env.GO_VERSION }}
 
       - name: Install Taskfile
+        if: fromJSON(matrix.config.container) == null
         uses: arduino/setup-task@v2
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           version: 3.x
 
+      - name: Install Taskfile
+        # actions/setup-task@v2 has dependency on a higher version of glibc than available in the Linux container.
+        if: fromJSON(matrix.config.container) != null
+        uses: arduino/setup-task@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
       - name: Package
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}