Fix formatting in changelog for Go path injection query

2 people + 2 models managed to tackle this insurmountable task.

Author: coadaflorin

docs/codeql/codeql-overview/codeql-changelog/codeql-cli-2.23.1.rst

@@ -126,7 +126,7 @@ Golang
 """"""
 
 *   The second argument of the :code:`CreateTemp` function, from the :code:`os` package, is no longer a path-injection sink due to proper sanitization by Go.
-*   The query "Uncontrolled data used in path expression" (:code:`go/path-injection`) now detects sanitizing a path by adding :code:`os.PathSeparator` or :code:\`` to the beginning.
+*   The query "Uncontrolled data used in path expression" (:code:`go/path-injection`) now detects sanitizing a path by adding :code:`os.PathSeparator` or :code:`\ ` to the beginning.
 
 Java/Kotlin
 """""""""""