Update the documentation

Author: cmcgee1024

Documentation/SwiftlyDocs.docc/swiftly-cli-reference.md

@@ -405,7 +405,7 @@ written to this file as commands that can be run after the installation.
 Perform swiftly initialization into your user account.
 
 ```
-swiftly init [--no-modify-profile] [--overwrite] [--platform=<platform>] [--skip-install] [--assume-yes] [--verbose] [--version] [--help]
+swiftly init [--no-modify-profile] [--overwrite] [--platform=<platform>] [--skip-install] [--quiet-shell-followup] [--assume-yes] [--verbose] [--version] [--help]
 ```
 
 **--no-modify-profile:**
@@ -428,6 +428,11 @@ swiftly init [--no-modify-profile] [--overwrite] [--platform=<platform>] [--skip
 *Skip installing the latest toolchain*
 
 
+**--quiet-shell-followup:**
+
+*Quiet shell follow up commands*
+
+
 **--assume-yes:**
 
 *Disable confirmation prompts by assuming 'yes'*