Update documentation for Go 1.16 and installer 4.9

docs/prepare-a-shared-rp-development-environment.md

@@ -45,7 +45,7 @@ locations.
    PULL_SECRET=...
    ```
 
-1. Install [Go 1.14](https://golang.org/dl) or later, if you haven't already.
+1. Install [Go 1.16](https://golang.org/dl) or later, if you haven't already.
 
 1. Install the [Azure
    CLI](https://docs.microsoft.com/en-us/cli/azure/install-azure-cli), if you

docs/prepare-your-dev-environment.md

@@ -3,7 +3,7 @@
 This document goes through the development dependencies one requires in order to build the RP code.
 
 ## Software Required
-1. Install [Go 1.14](https://golang.org/dl) or later, if you haven't already.
+1. Install [Go 1.16](https://golang.org/dl) or later, if you haven't already.
 
 1. Install [Python 3.6+](https://www.python.org/downloads), if you haven't already.  You will also need `python-setuptools` installed, if you don't have it installed already.
 

docs/upstream-differences.md

@@ -5,7 +5,7 @@ upstream OCP.
 
 ## Installer carry patches
 
-See https://github.com/openshift/installer/compare/release-4.8...jewzaam:release-4.8-azure.
+See https://github.com/openshift/installer/compare/release-4.9...jewzaam:release-4.9-azure.
 
 ## Installation differences