chore: update the branch name (mdn#35787)

files/en-us/learn/index.md

@@ -76,7 +76,7 @@ There are patterns that make it easier to find these resources, for example:
 ## Getting our code examples
 
 The code examples you'll encounter in the Learning Area are all [available on GitHub](https://github.com/mdn/learning-area/).
-If you want to copy them all to your computer, the easiest way is to [download a ZIP of the latest master code branch](https://codeload.github.com/mdn/learning-area/zip/main).
+If you want to copy them all to your computer, the easiest way is to [download a ZIP of the latest main code branch](https://codeload.github.com/mdn/learning-area/zip/main).
 
 If you prefer to copy the repo in a more flexible way that allows for automatic updates, you can follow the more complex instructions:
 
@@ -90,7 +90,7 @@ If you prefer to copy the repo in a more flexible way that allows for automatic
 
 4. You can now enter the directory and find the files you are after (either using your Finder/File Explorer or the [`cd` command](<https://en.wikipedia.org/wiki/Cd_(command)>)).
 
-You can update the `learning-area` repository with any changes made to the master version on GitHub with the following steps:
+You can update the `learning-area` repository with any changes made to the main version on GitHub with the following steps:
 
 1. In your command prompt/terminal, go inside the `learning-area` directory using `cd`. For example, if you were in the parent directory: