added link to awesome regex bundle

learnbyexample · web-flow · commit 2f870d20aacf · 2020-06-19T17:07:14.000+05:30
diff --git a/README.md b/README.md
@@ -19,6 +19,7 @@ You can purchase the book using these links:
 * https://gumroad.com/l/gnu_awk
 * https://leanpub.com/gnu_awk
 * You can also get the book as part of **Magical one-liners** bundle from https://gumroad.com/l/oneliners or https://leanpub.com/b/oneliners
+* You can also get the book as part of **Awesome Regex** bundle from https://leanpub.com/b/regex or https://gumroad.com/l/regex
 * See https://learnbyexample.github.io/books/ for list of other books
 
 For a preview of the book, see [sample chapters](https://github.com/learnbyexample/learn_gnuawk/blob/master/sample_chapters/awk_sample_chapters.pdf)
