Fix link to INSTALL.md

Author: swaroopch

translation_howto.md

@@ -5,4 +5,4 @@
 3. Then, fetch the repository to your computer. You need to know how to use [Git](http://www.git-scm.com) to do that.
 4. Read the [Honkit documentation](https://honkit.netlify.app), esp. the [Markdown section](https://honkit.netlify.app/syntax/markdown.html).
 5. Start editing the `.md` files to translate to your local language.
-6. See [INSTALL.md](./INSTALL.md) on how to generate the website, PDF, EPUB.
+6. See [INSTALL.md](https://github.com/swaroopch/byte-of-python/blob/master/INSTALL.md) on how to generate the website, PDF, EPUB.