Fix GitHub security setup guides

- Remove incorrect 'Restrict pushes that create files' option
- This setting is not available in the current GitHub interface
- Update both main guide and quick reference to reflect actual available options
- Based on actual GitHub settings screenshot provided

Author: AlmostBald-TRADING

GITHUB_SECURITY_SETUP.md

@@ -37,7 +37,7 @@ Set the following options:
 - ✅ Check this box
 
 #### ✅ **Restrict pushes that create files**
-- ✅ Check this box (optional but recommended)
+- ❌ **Note**: This option is not available in the current GitHub interface
 
 #### ✅ **Do not allow bypassing the above settings**
 - ✅ Check this box

SECURITY_QUICK_REFERENCE.md

@@ -18,6 +18,7 @@
 - [ ] Enable "Require branches to be up to date"
 - [ ] Enable "Require conversation resolution"
 - [ ] Enable "Do not allow bypassing the above settings"
+- [ ] Note: "Restrict pushes that create files" is not available in current GitHub interface
 
 ### Security Features (2 minutes)
 - [ ] Go to Settings > Security & analysis