C++: respond to PR comments on qldoc

Author: Robert Marsh

cpp/ql/src/semmle/code/cpp/Linkage.qll

@@ -1,5 +1,5 @@
 /**
- * Proivdes the `LinkTarget` class representing linker invocations at compile time.
+ * Proivdes the `LinkTarget` class representing linker invocations during the build process.
  */
 
 import semmle.code.cpp.Class

cpp/ql/src/semmle/code/cpp/models/implementations/Strcat.qll

@@ -1,5 +1,5 @@
 /**
- * Provides implementation classes  modelling `strcat` and various similar functions.
+ * Provides implementation classes modelling `strcat` and various similar functions.
  * See `semmle.code.cpp.models.Models` for usage information.
  */