Fix mongoose docs generation

PUBLISHED_FROM=331821dcd1f7dc8a94581cd8a9b51aa00a89fddc

docs/c-api/mg_dns_server.h/mg_dns_send_reply.md

@@ -0,0 +1,19 @@
+---
+title: "mg_dns_send_reply()"
+decl_name: "mg_dns_send_reply"
+symbol_kind: "func"
+signature: |
+  void mg_dns_send_reply(struct mg_connection *nc, struct mg_dns_reply *r);
+---
+
+Sends a DNS reply through a connection.
+
+The DNS data is stored in an IO buffer pointed by reply structure in `r`.
+This function mutates the content of that buffer in order to ensure that
+the DNS header reflects the size and flags of the message, that might have
+been updated either with `mg_dns_reply_record` or by direct manipulation of
+`r->message`.
+
+Once sent, the IO buffer will be trimmed unless the reply IO buffer
+is the connection's send buffer and the connection is not in UDP mode. 
+