Fixing ungrammatical usage of 'comprised of'.

Author: chrisdenman

index.md

@@ -28,7 +28,7 @@ _See also [HTTP/2 JP](https://github.com/http2jp), maintained by the Japanese HT
 
 ## Specifications
 
-HTTP/2 is comprised of two specifications:
+HTTP/2 is composed of two specifications:
 
 * Hypertext Transfer Protocol version 2 - [RFC9113](https://httpwg.org/specs/rfc9113.html)
 * HPACK - Header Compression for HTTP/2 - [RFC7541](https://httpwg.org/specs/rfc7541.html)