Wording improvements from review

website/content/docs/connect/config-entries/ingress-gateway.mdx

@@ -397,7 +397,7 @@ spec:
 <Tabs>
 <Tab heading="Consul OSS">
 
-Set up a HTTP listener on an ingress gateway named "us-east-ingress" to proxy
+Set up an HTTP listener on an ingress gateway named "us-east-ingress" to proxy
 traffic to a virtual service named "api".
 
 Additionally, ensure internal-only debug headers are stripped before responding
@@ -476,7 +476,7 @@ spec:
 </Tab>
 <Tab heading="Consul Enterprise">
 
-Set up a HTTP listener on an ingress gateway named "us-east-ingress" in the
+Set up an HTTP listener on an ingress gateway named "us-east-ingress" in the
 default namespace to proxy traffic to a virtual service named "api".
 
 Additionally, ensure internal-only debug headers are stripped before responding

website/content/docs/connect/config-entries/service-router.mdx

@@ -610,9 +610,10 @@ spec:
       yaml: false,
       name: 'Add',
       type: 'map<string|string>: optional',
-      description: `The set of header values to add, keyed by header name.
+      description: `The set of key/value pairs that specify header values to add.
-      If a header with the same (case-insensitive) name already
+      Use header names as keys. Header names are _not_ case-sensitive.
-      exists, the value set here will be appended and both will be present.
+      If header values with the same name already exist, the value set here will
+      be appended and both will be present.
       If Envoy is used as the proxy, the value may contain
       [variable placeholders](https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_conn_man/headers#custom-request-response-headers) for example
       \`%DOWNSTREAM_REMOTE_ADDRESS%\` to interpolate dynamic request
@@ -622,9 +623,10 @@ spec:
       yaml: false,
       name: 'Set',
       type: 'map<string|string>: optional',
-      description: `The set of header value keyed by header name to
+      description: `The set of key/value pairs that specify header values to add.
-      add. If one or more header values with the same (case-insensitive) name already exist,
+      Use header names as keys. Header names are _not_ case-sensitive.
-      the value set here will replace them all.
+      If header values with the same name already exist, the value set here will
+      _replace_ them.
       If Envoy is used as the proxy, the value may contain
       [variable placeholders](https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_conn_man/headers#custom-request-response-headers) for example
       \`%DOWNSTREAM_REMOTE_ADDRESS%\` to interpolate dynamic request