Fix typo in Gateway API page (#43819)

* fix typo

* Revert "fix typo"

This reverts commit 3f971ba.

* fix typo

Author: yash-raj10

content/en/docs/concepts/services-networking/gateway.md

@@ -166,7 +166,7 @@ In this example, the request flow for a Gateway implemented as a reverse proxy i
    and attached HTTPRoute.
 4. Optionally, the reverse proxy can perform request header and/or path matching based
    on match rules of the HTTPRoute.
-5. Optionally, the reverse proxy can modify the request; for example, to add or emove headers,
+5. Optionally, the reverse proxy can modify the request; for example, to add or remove headers,
    based on filter rules of the HTTPRoute.
 6. Lastly, the reverse proxy forwards the request to one or more backends.