Driver opts syntax error

Author: kylemaps

.github/workflows/build-neurodesktop-test.yml

@@ -61,7 +61,8 @@ jobs:
       uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2
       #change to if else later, this is for testing the arc runners.
       with:
-        driver-opts: network.mtu=1400
+        driver-opts: |
+          network.mtu=1400
     - name: Login to GHCR
       uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772
       with: