Create README.md

Author: raghavs046

Specialized Areas/Regular Expressions/Img Tag Regex validator/README.md

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+**Regex Pattern**
+<img : looks for <img in text 
+\w : looks for any word character (equivalent to [a-zA-Z0-9_])
+\W looks for any non-word character (equivalent to [^a-zA-Z0-9_])
+> : looks for character >
+
+**How to use**
+1. Run this query in background/Fix scripts.
+2. The info message will return articles having images. This is very useful information when there are broken images in articles after movement between instances or tools.
+3. This can be further enhanced to replace image src if required.