reword enable_http2 description

Author: moleske

jobs/gorouter/spec

@@ -106,7 +106,7 @@ properties:
     description: Disables the http listener on port specified by router.port. This cannot be set to true if enable_ssl is false.
     default: false
   router.enable_http2:
-    description: Enables the HTTP/2 protocol for communicating with apps.
+    description: Enables support for HTTP/2 ingress traffic to the Gorouter. Also enables the option to use the HTTP/2 protocol for traffic to specified backends.
     default: true
   router.min_tls_version:
     description: Minimum accepted version of TLS protocol. All versions above this, up to the max_tls_version, will also be accepted. Valid values are TLSv1.0, TLSv1.1, TLSv1.2, and TLSv1.3.