Fix documentation links (#90)

Co-authored-by: Prabhat Tiwari <42660698+prabhattiwari16@users.noreply.github.com>
Co-authored-by: Sorin Sbarnea <sorin.sbarnea@gmail.com>

README.md

@@ -5,20 +5,20 @@
 # tendo
 
 Tendo is a python module that adds basic functionality that is
-not provided by Python. Read the [documentation](https://tendo.readthedocs.org/en/latest/) for more info.
+not provided by Python. Read the [documentation](https://tendo.readthedocs.io) for more info.
 
-- [transparent Unicode support for text file operations (BOM detection)](https://tendo.readthedocs.org/en/latest/#module-tendo.singleton)
-- [console logging coloring](https://tendo.readthedocs.org/en/latest/#module-tendo.colorer)
+- [transparent Unicode support for text file operations (BOM detection)](https://tendo.readthedocs.io/#module-tendo.singleton)
+- [console logging coloring](https://tendo.readthedocs.io/#module-tendo.colorer)
 - enable you to use symlinks under windows
-- [python tee implementation](https://tendo.readthedocs.org/en/latest/#module-tendo.colorer) for executing external programs and redirecting their output to both console/file
-- [improved execfile](https://tendo.readthedocs.org/en/latest/#module-tendo.execfile2)
+- [python tee implementation](https://tendo.readthedocs.io/#module-tendo.colorer) for executing external programs and redirecting their output to both console/file
+- [improved execfile](https://tendo.readthedocs.io/#module-tendo.execfile2)
 
-## Requirements and compatibility
+## Requirements and Compatibility
 
 - python 3.8 or newer
 - tox for running tests
 
-## Related projects and packages
+## Related Projects and Packages
 
 - jaraco - http://pypi.python.org/pypi/jaraco.util
 - pexpect (maybe)