Change master to main while creating page branch

content/basics/process/in-a-nutshell.md

@@ -52,7 +52,7 @@ After reading all the steps, it is time to summarize everything for faster code
    git push origin <page-version-branch> --force
    git update-ref -d HEAD
    git reset
-   git checkout master --force
+   git checkout main --force
    ```
 
 7. Email to TU Delft

content/basics/process/publish.md

@@ -99,7 +99,7 @@ git commit -m "New book version <book-version>"
 git push origin <page-version-branch> --force
 git update-ref -d HEAD
 git reset
-git checkout master --force
+git checkout main --force
 ```
 
 ```{admonition} This is a non-reversible step!