[docs] update url in CONTRIBUTING.md

CONTRIBUTING.md

@@ -144,7 +144,7 @@ referenced in the rst, e.g.
 
 aren't actually included in that directory. _Instead_, you'll want to add and commit
 images (and any other static assets) to the _superset/assets/images_ directory.
-When the docs are being pushed to [airbnb.io](http://airbnb.io/superset/), images
+When the docs are being pushed to [Apache Superset (incubating)](https://superset.incubator.apache.org/), images
 will be moved from there to the _\_static/img_ directory, just like they're referenced
 in the docs.
 
@@ -161,12 +161,12 @@ instead.
 
 ## Setting up a Python development environment
 
-Check the [OS dependencies](http://airbnb.io/superset/installation.html#os-dependencies) before follows these steps.
+Check the [OS dependencies](https://superset.incubator.apache.org/installation.html#os-dependencies) before follows these steps.
 
     # fork the repo on GitHub and then clone it
     # alternatively you may want to clone the main repo but that won't work
     # so well if you are planning on sending PRs
-    # git clone [email protected]:airbnb/superset.git
+    # git clone [email protected]:apache/incubator-superset.git
 
     # [optional] setup a virtual env and activate it
     virtualenv env
@@ -379,4 +379,4 @@ to take effect, they need to be compiled using this command:
 
 Here's an example as a Github PR with comments that describe what the
 different sections of the code do:
-https://github.com/airbnb/superset/pull/3013
+https://github.com/apache/incubator-superset/pull/3013