Fixed the broken links for "Contribution.md" and "Idea List" page

README.md

@@ -22,11 +22,11 @@ We broadly have two types of audience here, one is Citizen Data Scientists and M
 Documentation for the latest release is hosted at https://intel.github.io/dffml/
 
 Documentation for the main branch is hosted at
-https://intel.github.io/dffml/main/index.html
+https://intel.github.io/dffml/master/index.html
 
 ## Contributing
 
-The [contributing page](https://intel.github.io/dffml/main/contributing/index.html)
+The [contributing page](https://intel.github.io/dffml/master/contributing/index.html)
 will guide you through getting setup and contributing to DFFML.
 
 ## Help

docs/contributing/gsoc/2022/index.rst

@@ -28,7 +28,7 @@ implementations in the same way.
 DFFML is also a tool for dataset generation. DFFML ues directed graphs to
 generate and modify datasets.
 
-Read more on the about page: https://intel.github.io/dffml/main/about.html
+Read more on the about page: https://intel.github.io/dffml/master/about.html
 
 Project Ideas
 -------------