language supported in readme.md; Ignore HTML files

Author: coatless

.gitignore

@@ -4,4 +4,5 @@
 build*
 .DS_Store*
 _site*
-README_files*
+README_files*
+*.html

README.md

@@ -105,6 +105,12 @@ The extension includes pre-configured setup for:
 
 Additional languages are supported via magic commands without requiring specific setup cells.
 
+- Ruby 
+- Perl 
+- bash/sh
+
+For additional languages, you can define custom magic commands and setup cells in the document's header.
+
 ## Acknowledgements
 
 This extension is based on the [Using Google Colab with GitHub](https://colab.research.google.com/github/googlecolab/colabtools/blob/master/notebooks/colab-github-demo.ipynb#scrollTo=8QAWNjizy_3O) notebook.