fix: fix github url strings (org edx -> openedx)

Author: sarina

.github/workflows/upgrade-python-requirements.yml

@@ -39,7 +39,7 @@ jobs:
 
       - name: setup testeng-ci
         run: |
-          git clone https://github.com/edx/testeng-ci.git
+          git clone https://github.com/openedx/testeng-ci.git
           cd $GITHUB_WORKSPACE/testeng-ci
           pip install -r requirements/base.txt
       - name: create pull request

README.rst

@@ -204,7 +204,7 @@ There is a rich community of XBlock developers that have put together a large
 number of XBlocks that have been used in various contexts, mostly on the edx-platform.
 You can see examples of what that community has done in the `edx-platform wiki`_.
 
-.. _the README: https://github.com/edx/xblock-sdk/blob/master/sample_xblocks/README.rst
+.. _the README: https://github.com/openedx/xblock-sdk/blob/master/sample_xblocks/README.rst
 .. _edx-platform wiki: https://openedx.atlassian.net/wiki/spaces/COMM/pages/43385346/XBlocks+Directory
 
 
@@ -243,7 +243,7 @@ You can discuss this code on the `edx-code Google Group`__ or in the
 
 __ https://groups.google.com/group/edx-code
 
-.. |build-status| image:: https://github.com/edx/xblock-sdk/workflows/Python%20CI/badge.svg?branch=master
-:target: https://github.com/edx/xblock-sdk/actions?query=workflow%3A%22Python+CI%22
+.. |build-status| image:: https://github.com/openedx/xblock-sdk/workflows/Python%20CI/badge.svg?branch=master
+:target: https://github.com/openedx/xblock-sdk/actions?query=workflow%3A%22Python+CI%22
 .. |coverage-status| image:: https://coveralls.io/repos/edx/xblock-sdk/badge.png
    :target: https://coveralls.io/r/edx/xblock-sdk

doc/getting_started.rst

@@ -41,7 +41,7 @@ Get the XBlock-SDK repository
 
 The XBlock code is on Github.  Get the code by cloning the XBlock-SDK repo::
 
-    $ git clone https://github.com/edx/xblock-sdk.git
+    $ git clone https://github.com/openedx/xblock-sdk.git
 
 This will create the XBlock-SDK directory in your current directory.