server-server-api: Fix grammar in server discovery (#1665)

changelogs/client_server/newsfragments/1665.clarification

@@ -0,0 +1 @@
+Fix various typos throughout the specification.

content/server-server-api.md

@@ -186,8 +186,8 @@ to send. The process overall is as follows:
     header of `<hostname>`. The target server must present a valid certificate
     for `<hostname>`.
 
-6.  If the `/.well-known` request returned an error response, and the
-    SRV record was not found, an IP address is resolved using CNAME, AAAA and A
+6.  If the `/.well-known` request returned an error response, and
+    no SRV records were found, an IP address is resolved using CNAME, AAAA and A
     records. Requests are made to the resolved IP address using port
     8448 and a `Host` header containing the `<hostname>`. The target
     server must present a valid certificate for `<hostname>`.