Update README.md

Author: irtsa-dev

README.md

@@ -17,6 +17,7 @@ A collection of random scripts/tools I made in <a href="https://codedocs.ghtools
 <p align="center"><a href="https://github.com/irtsa-dev/greyscript-tools/wiki/Gain-Root">Gain Root</a></p>
 <p align="center"><a href="https://github.com/irtsa-dev/greyscript-tools/wiki/Num-to-Sprite">Num to Sprite</a></p>
 <p align="center"><a href="https://github.com/irtsa-dev/greyscript-tools/wiki/Progress-Bar">Progress Bar</a></p>
+<p align="center"><a href="https://github.com/irtsa-dev/greyscript-tools/wiki/File-Size">File Size</a></p>
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