Fix link text

Author: tonyroberts

content/pages/index.md

@@ -25,7 +25,7 @@ An alternative package for writing data, formatting information and, in particul
 
 Library with a unified api for reading and writing files with older Excel format (xls), Excel 2010 format (xlsx), OpenDocument Spreadsheet format (ods), and many others.
 
-[Download](https://pypi.org/project/pyexcel/) | [Documentation](https://docs.pyexcel.org/en/latest/) | [Bitbucket](https://github.com/pyexcel/pyexcel)
+[Download](https://pypi.org/project/pyexcel/) | [Documentation](https://docs.pyexcel.org/en/latest/) | [GitHub](https://github.com/pyexcel/pyexcel)
 
 ### pyxlsb