Merge pull request #33 from kir-rescomp/dev

add a note on default branch being configured as main

Author: DininduSenanayake

docs/3.setting_up_git.md

@@ -44,6 +44,9 @@ On a command line, Git commands are written as `git verb options`, where `verb`
         ```
 
 !!! code-branch "Configuring Default Branch name to `main`  ( not needed for MacOS)"
+
+    In 2020, most Git code hosting services transitioned to using main as the default branch. As an example, any new repository that is opened in GitHub and GitLab default to main. However, Git has not yet made the same change. As a result, local repositories must be manually configured have the same main branch name as most cloud services
+    
     ```bash
     git config --global init.defaultBranch main
     ```