Add Ruby to language table

Author: hubwriter

docs/codeql/support/reusables/versions-compilers.rst

@@ -22,6 +22,7 @@
    Eclipse compiler for Java (ECJ) [5]_",``.java``
    JavaScript,ECMAScript 2021 or lower,Not applicable,"``.js``, ``.jsx``, ``.mjs``, ``.es``, ``.es6``, ``.htm``, ``.html``, ``.xhm``, ``.xhtml``, ``.vue``, ``.json``, ``.yaml``, ``.yml``, ``.raml``, ``.xml`` [6]_"
    Python,"2.7, 3.5, 3.6, 3.7, 3.8, 3.9",Not applicable,``.py``
+   Ruby,"up to 3.02",Not applicable,"``.rb``, ``.erb``, ``.gemspec``, ``Gemfile``"
    TypeScript [7]_,"2.6-4.4",Standard TypeScript compiler,"``.ts``, ``.tsx``"
 
 .. container:: footnote-group