Docs: Add Actions pages for CWE coverage

Author: adityasharad

docs/codeql/query-help/codeql-cwe-coverage.rst

@@ -27,6 +27,7 @@ Note that the CWE coverage includes both "`supported queries <https://github.com
    :titlesonly:
 
    full-cwe
+   actions-cwe
    cpp-cwe
    csharp-cwe
    go-cwe

docs/codeql/query-help/index.rst

@@ -5,6 +5,7 @@ View the query help for the queries included in the ``default``, ``security-exte
 
 - :doc:`CodeQL query help for C and C++ <cpp>`
 - :doc:`CodeQL query help for C# <csharp>`
+- :doc:`CodeQL query help for GitHub Actions <actions>`
 - :doc:`CodeQL query help for Go <go>`
 - :doc:`CodeQL query help for Java and Kotlin <java>`
 - :doc:`CodeQL query help for JavaScript and TypeScript <javascript>`
@@ -28,6 +29,7 @@ For a full list of the CWEs covered by these queries, see ":doc:`CodeQL CWE cove
    :hidden:
    :titlesonly:
 
+   actions
    cpp
    csharp
    go