Apply suggestions from code review

Co-authored-by: Nick Rolfe <nickrolfe@github.com>

Author: hmac

ruby/ql/lib/codeql/ruby/Concepts.qll

@@ -468,7 +468,7 @@ module Http {
     }
 
     /**
-     * A data flow node that writes data to a header in a HTTP response.
+     * A data flow node that writes data to a header in an HTTP response.
      *
      * Extend this class to refine existing API models. If you want to model new APIs,
      * extend `HeaderWriteAccess::Range` instead.
@@ -484,7 +484,7 @@ module Http {
     /** Provides a class for modeling new HTTP header writes. */
     module HeaderWriteAccess {
       /**
-       * A data flow node that writes data to the a header in a HTTP response.
+       * A data flow node that writes data to the header in an HTTP response.
        *
        * Extend this class to model new APIs. If you want to refine existing API models,
        * extend `HeaderWriteAccess` instead.

ruby/ql/src/change-notes/2022-10-14-actiondispatch-response.md

@@ -2,4 +2,4 @@
 category: minorAnalysis
 ---
 * HTTP response header and body writes via `ActionDispatch::Response` are now
-  recognised.
+  recognized.