fix: Remove typo. (feast-dev#4351)

Author: shuchu

docs/reference/feature-servers/README.md

@@ -8,7 +8,6 @@ Feast users can choose to retrieve features from a feature server, as opposed to
 
 {% content-ref url="go-feature-server.md" %}
 [go-feature-server.md](go-feature-server.md)
-=======
 {% endcontent-ref %}
 
 {% content-ref url="offline-feature-server.md" %}