Fixing more upstream typos

Author: jonjanego

docs/codeql/codeql-overview/codeql-changelog/codeql-cli-2.21.0.rst

@@ -207,5 +207,5 @@ JavaScript/TypeScript
 
     *   Intersection :code:`&&`
     *   Subtraction :code:`--`
-    *   :code:`\q` quoted string
+    *   :code:`\\q` quoted string
 

java/ql/lib/change-notes/released/7.1.2.md

@@ -3,7 +3,7 @@
 ### Minor Analysis Improvements
 
 * Java extraction is now able to download Maven 3.9.x if a Maven Enforcer Plugin configuration indicates it is necessary. Maven 3.8.x is still preferred if the enforcer-plugin configuration (if any) permits it.
-* Added a path injection sanitizer for calls to `java.lang.String.matches`, `java.lang.String.replace`, and `java.lang.String.replaceAll` that make sure '/', '\', '..' are not in the path.
+* Added a path injection sanitizer for calls to `java.lang.String.matches`, `java.lang.String.replace`, and `java.lang.String.replaceAll` that make sure `/`, `\\`, `..` are not in the path.
 
 ### Bug Fixes