Fix link typo in readme [skip ci]

README.md

@@ -402,7 +402,7 @@ There are a few optional environment variables available for customizing a Whoog
 | WHOOGLE_USER_AGENT   | The desktop user agent to use. Defaults to a randomly generated one.                      |
 | WHOOGLE_USER_AGENT_MOBILE | The mobile user agent to use. Defaults to a randomly generated one.                  |
 | WHOOGLE_USE_CLIENT_USER_AGENT | Enable to use your own user agent for all requests. Defaults to false.           |
-| WHOOGLE_REDIRECTS    | Specify sites that should be redirected elsewhere. See (custom redirecting)(#custom-redirecting). |
+| WHOOGLE_REDIRECTS    | Specify sites that should be redirected elsewhere. See [custom redirecting](#custom-redirecting). |
 | EXPOSE_PORT          | The port where Whoogle will be exposed.                                                   |
 | HTTPS_ONLY           | Enforce HTTPS. (See [here](https://github.com/benbusby/whoogle-search#https-enforcement)) |
 | WHOOGLE_ALT_TW       | The twitter.com alternative to use when site alternatives are enabled in the config. Set to "" to disable. |