Update README.md

Author: data-man

README.md

@@ -5,3 +5,5 @@ SRELL (**s**td::**r**eg**e**x-**l**ike **l**ibrary) is a regular expression temp
 Please read `readme_en.txt` or `readme_ja.txt`.
 
 If any bug is found, please send a report to the author rather than posting a new issue here. The author's email address is found at the bottom of [SRELL](https://www.akenotsuki.com/misc/srell/en) page.
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