KNOWN_BUGS: aws-sigv4 does not behave well with AWS VPC Lattice

Closes #11007

docs/KNOWN_BUGS

@@ -107,6 +107,7 @@ problems may have been fixed or changed somewhat since this was written.
  16.3 aws-sigv4 is missing the amz-content-sha256 header
  16.4 aws-sigv4 does not sort query string parameters before signing
  16.5 aws-sigv4 does not sign requests with empty URL query correctly
+ 16.6 aws-sigv4 does not behave well with AWS VPC Lattice
 
  17. HTTP/2
  17.2 HTTP/2 frames while in the connection pool kill reuse
@@ -615,6 +616,10 @@ problems may have been fixed or changed somewhat since this was written.
 
  https://github.com/curl/curl/issues/10129
 
+16.6 aws-sigv4 does not behave well with AWS VPC Lattice
+
+ https://github.com/curl/curl/issues/11007
+
 17. HTTP/2
 
 17.2 HTTP/2 frames while in the connection pool kill reuse