ENH: Transition cookiecutter default branch name to main

Transition cookiecutter default branch name to `main`.

Author: jhlegarreta

{{cookiecutter.project_name}}/.github/workflows/build-test-package.yml

@@ -83,8 +83,8 @@ jobs:
         file(TO_CMAKE_PATH "\$ENV{GITHUB_WORKSPACE}/" CTEST_SOURCE_DIRECTORY)
         file(TO_CMAKE_PATH "\$ENV{GITHUB_WORKSPACE}/../build" CTEST_BINARY_DIRECTORY)
         set(dashboard_source_name "${GITHUB_REPOSITORY}")
-        if(ENV{GITHUB_REF} MATCHES "master")
-          set(branch "-master")
+        if(ENV{GITHUB_REF} MATCHES "main")
+          set(branch "-main")
           set(dashboard_model "Continuous")
         else()
           set(branch "-${GITHUB_REF}")

{{cookiecutter.project_name}}/README.rst

@@ -9,7 +9,7 @@
     :alt: PyPI Version
 
 .. image:: https://img.shields.io/badge/License-Apache%202.0-blue.svg
-    :target: {{ cookiecutter.download_url }}/blob/master/LICENSE
+    :target: {{ cookiecutter.download_url }}/blob/main/LICENSE
     :alt: License
 
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