use CPU

Author: Radovan Fuchs

.tekton/integration-tests/pipeline/lightspeed-stack-integration-test.yaml

@@ -81,7 +81,7 @@ spec:
               - name: version
                 value: "$(steps.pick-version.results.version)"
               - name: instanceType
-                value: "g5.2xlarge"
+                value: "m5.large"
     - name: get-stack-images
       description: Extract lightspeed-stack image and commit from SNAPSHOT (llama-stack image is from pipeline param)
       runAfter: