Update Mobile Application Security Cheat Sheet with iOS-Specific Guidelines

[richeeta]

Added iOS-specific security recommendations to the Mobile Application Security Cheat Sheet, specifically: guidelines on Shortcuts permissions, Siri permissions, deep links, and WidgetKit security.

This change was made to enhance the security best practices for iOS apps, addressing issue #1524.

[richeeta]

fixed spacing

[szh]

Thanks for the PR! There are a few lint errors remaining:

cheatsheets/Mobile_Application_Security_Cheat_Sheet.md:254 MD032/blanks-around-lists Lists should be surrounded by blank lines [Context: "- There are several scenarios ..."]
cheatsheets/Mobile_Application_Security_Cheat_Sheet.md:255 MD032/blanks-around-lists Lists should be surrounded by blank lines [Context: "1. If a Shortcut is added as a..."]
cheatsheets/Mobile_Application_Security_Cheat_Sheet.md:260:119 MD009/no-trailing-spaces Trailing spaces [Expected: 0 or 2; Actual: 1]
cheatsheets/Mobile_Application_Security_Cheat_Sheet.md:260 MD032/blanks-around-lists Lists should be surrounded by blank lines [Context: "6. If a Shortcut is set to run..."]
cheatsheets/Mobile_Application_Security_Cheat_Sheet.md:261 MD032/blanks-around-lists Lists should be surrounded by blank lines [Context: "- Sensitive app functionalitie..."]

I wonder if we have an experienced iOS developer who could review this...

[mackowski]

@richeeta can you please fix linter errors?