Update README.md

Author: JorjMcKie

README.md

@@ -58,7 +58,7 @@ Have a look at the basic [demos](https://github.com/pymupdf/PyMuPDF-Utilities/tr
 
 Documentation is written using Sphinx and is available in various formats from the following sources. It currently is a combination of reference guide and user manual. For a **quick start** look at the [tutorial](https://pymupdf.readthedocs.io/en/latest/tutorial.html) and the [recipes](https://pymupdf.readthedocs.io/en/latest/faq.html) chapters.
 
-* You can view it online at [Read the Docs](https://pymupdf.readthedocs.io/en/latest/index.html). This site also provides download options for PDF.
+* You can view it online at [Read the Docs](https://readthedocs.org/projects/pymupdf/). This site also provides download options for PDF.
 * The search function on Read the Docs does not work for me currently. If you want a working searchable local version, please download a zipped HTML for [here](https://github.com/pymupdf/PyMuPDF-optional-material/tree/master/doc/pymupdf.zip).
 * Find a Windows help file [here](https://github.com/pymupdf/PyMuPDF-optional-material/tree/master/doc/PyMuPDF.chm).