update 'Encoders/Decoders and Regex testing'

- signed-off-by: trimstray <trimstray@gmail.com>

README.md

@@ -418,7 +418,7 @@ Only main chapters:
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://regexr.com/"><b>RegExr</b></a> - online tool to learn, build, & test Regular Expressions (RegEx / RegExp).<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.regextester.com/"><b>RegEx Testing</b></a> - online regex testing tool.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://www.regexpal.com/"><b>RegEx Pal</b></a> - online regex testing tool + other tools.<br>
-&nbsp;&nbsp;:small_orange_diamond: <a href="https://gchq.github.io/CyberChef/"><b>CyberChef</b></a> - The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="https://gchq.github.io/CyberChef/"><b>The Cyber Swiss Army Knife</b></a> - a web app for encryption, encoding, compression and data analysis.<br>
 </p>
 
 ##### :black_small_square: Net-tools