Update to new quay.io nginx-unprivileged image

Signed-off-by: Jonathan West <[email protected]>

Author: jgwest

tests/e2e/fixture/rollouts/fixture.go

@@ -42,8 +42,8 @@ spec:
         app: test-argo-app
     spec:
       containers:
-      - image: "quay.io/nginx/nginx-unprivileged@sha256:2700504269be5deda0085e218bd5cf624bdb2efd9a3025966c08c886e71ae4cf"
-        # From: https://quay.io/repository/nginx/nginx-unprivileged/manifest/sha256:2700504269be5deda0085e218bd5cf624bdb2efd9a3025966c08c886e71ae4cf
+      - image: "quay.io/nginx/nginx-unprivileged@sha256:6d51e4a8e10dfe334f8e2d15bb81b1ed2580ea9cb874b644acc720eda7022b54"
+        # From: https://quay.io/repository/nginx/nginx-unprivileged 1.27.3 
         name: webserver-simple
         ports:
         - containerPort: 8080