Replace Travis CI badge with GitHub Actions badge

- Remove Travis CI badge and replace with GitHub Actions CI badge
- Update badge URL to point to GitHub Actions workflow
- Clean up any remaining Travis CI references

Author: prabhakar267

.travis.yml

@@ -1,5 +1,5 @@
 # Image2Text
-[![Build Status](https://api.travis-ci.org/prabhakar267/image2text.svg?branch=master)](https://travis-ci.org/prabhakar267/image2text)
+[![CI](https://github.com/prabhakar267/image2text/actions/workflows/ci.yml/badge.svg)](https://github.com/prabhakar267/image2text/actions/workflows/ci.yml)
 
 **Image2Text** is a python wrapper to grab text from images and save as text files using [Google Tesseract Engine](https://github.com/tesseract-ocr/tesseract). Tesseract is an optical character recognition engine for various operating systems. It is free software, released under the Apache License, Version 2.0, and development has been sponsored by Google since 2006. In 2006 Tesseract was considered one of the most accurate open-source OCR engines then available.