Fix git resolver: use url for anonymous checkout

Signed-off-by: Vincent Demeester <vdemeest@redhat.com>

test/e2e/resources/pipeline-maven.yaml

@@ -25,10 +25,8 @@ spec:
       taskRef:
         resolver: git
         params:
-          - name: repo
-            value: tektoncd-catalog
-          - name: org
-            value: openshift-pipelines
+          - name: url
+            value: https://github.com/openshift-pipelines/tektoncd-catalog
           - name: revision
             value: p
           - name: pathInRepo