fix some typos (#5007)

* Update ingress.md

fix typo

* Update source-ip.md

docs/tutorials/services/source-ip.md

@@ -311,7 +311,7 @@ protocol between the loadbalancer and backend to communicate the true client IP
 such as the HTTP [X-FORWARDED-FOR](https://en.wikipedia.org/wiki/X-Forwarded-For)
 header, or the [proxy protocol](http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt).
 Loadbalancers in the second category can leverage the feature described above
-by simply creating a HTTP health check pointing at the port stored in
+by simply creating an HTTP health check pointing at the port stored in
 the `service.spec.healthCheckNodePort` field on the Service.
 
 {% endcapture %}