[8.x] Installer updates (#6939)

* Remove note about Git protocol

* Document branch flag

Author: driesvints

installation.md

@@ -192,9 +192,13 @@ For convenience, the Laravel installer can also create a Git repository for your
 laravel new example-app --git
 ```
 
-This command will initialize a new Git repository for your project and automatically commit the base Laravel skeleton. The `git` flag assumes you have properly installed and configured Git.
+This command will initialize a new Git repository for your project and automatically commit the base Laravel skeleton. The `git` flag assumes you have properly installed and configured Git. You can also use the `--branch` flag to set the initial branch name:
 
-Or, instead of using the `--git` flag, you may use the `--github` flag to create a Git repository and also create a corresponding private repository on GitHub:
+```bash
+laravel new example-app --git --branch="main"
+```
+
+Instead of using the `--git` flag, you may also use the `--github` flag to create a Git repository and also create a corresponding private repository on GitHub:
 
 ```bash
 laravel new example-app --github
@@ -212,8 +216,6 @@ You may use the `--organization` flag to create the repository under a specific
 laravel new example-app --github="--public" --organization="laravel"
 ```
 
-> {note} You may experience issues with the `github` flag if your system's Git protocol is set to `https`. If you're prompted for your GitHub username and password during the installation, try setting your system's Git protocol to `ssh` by running `gh config set git_protocol ssh --host github.com`.
-
 <a name="initial-configuration"></a>
 ## Initial Configuration