Rename "QLDoc specification" to "QLDoc comment specification"

Author: Shati Patel

docs/language/ql-handbook/lexical-syntax.rst

@@ -19,7 +19,7 @@ All standard one-line and multiline comments, as described in the `QL language s
 compiler and are only visible in the source code.
 You can also write another kind of comment, namely **QLDoc comments**. These comments describe
 QL entities and are displayed as pop-up information in QL editors. For information about QLDoc
-comments, see the `QLDoc specification <https://help.semmle.com/QL/ql-spec/qldoc.html>`_.
+comments, see the `QLDoc comment specification <https://help.semmle.com/QL/ql-spec/qldoc.html>`_.
 
 The following example uses these three different kinds of comments::
 

docs/language/ql-spec/index.rst

@@ -6,7 +6,7 @@ QL specifications
 
 For a formal specification of the QL language, including a description of syntax, terminology, and other technical details, please consult the QL language specification.
 
-For information on the terminology and syntax used in QLDoc comments, please consult the QLDoc specification.
+For information on the terminology and syntax used in QLDoc comments, please consult the QLDoc comment specification.
 
 .. toctree::
    :maxdepth: 2

docs/language/ql-spec/qldoc.rst

@@ -1,5 +1,5 @@
-QLDoc specification
-===================
+QLDoc comment specification
+===========================
 
 This document is a specification for QLDoc comments in QL source files.