HTTP rewrite matches the example text (#1346)

Co-authored-by: Kubernetes Prow Robot <k8s-ci-robot@users.noreply.github.com>

examples/experimental/http-redirect-rewrite/httproute-rewritepath.yaml

@@ -0,0 +1,21 @@
+#$ Used in:
+#$ - site-src/api-types/httproute.md
+apiVersion: gateway.networking.k8s.io/v1beta1
+kind: HTTPRoute
+metadata:
+  name: http-filter-rewrite
+spec:
+  hostnames:
+    - rewrite.example
+  rules:
+    - filters:
+      - type: URLRewrite
+        urlRewrite:
+          hostname: elsewhere.example
+          path:
+            type: ReplacePrefixMatch
+            replacePrefixMatch: /fennel
+      backendRefs:
+      - name: example-svc
+        weight: 1
+        port: 80

site-src/guides/http-redirect-rewrite.md

@@ -91,5 +91,5 @@ Instead using `type: ReplacePrefixMatch` and `replacePrefixMatch: /fennel` will
 request `https://elsewhere.example/fennel/smidgen` upstream.
 
 ```yaml
-{% include 'experimental/http-redirect-rewrite/httproute-rewrite.yaml' %}
+{% include 'experimental/http-redirect-rewrite/httproute-rewritepath.yaml' %}
 ```