Update README to include cross origin warning info

Author: pikapower9080

README.md

@@ -5,9 +5,9 @@ Canvas quick menu is a userscript for Instructure Canvas that adds a menu for qu
 - 📚 Search courses, upcoming assignments, canvas pages, announcements, and more
 - ⚡ Instant search results
 - ⌨ Quick access anywhere with one key
-- 🔁 Sync your settings across devices with no setup process 
+- 🔁 Sync your settings across devices with no setup
 - ➕ Add your own custom shortcuts to course specific resources or anything else
-- ⭐ Quick actions for new messages, calendar events, and 
+- ⭐ Quick actions for new inbox messages and calendar events
 - 🖼️ Replace course card images and banners with your own images (not supported by all schools)
 
 ## Usage
@@ -25,7 +25,7 @@ Type "Custom Shortcuts" into the menu to open up the custom shortcuts menu. Add
 3. Activate the Tampermonkey extension and click the "Create A New Script" button
 4. Delete everything in the script and paste what you copied from the page
 5. Save by pressing <kbd>Ctrl</kbd>/<kbd>⌘</kbd> + <kbd>S</kbd>
-6. Open up your school's canvas page and press escape after everything is done loading to see if it works!
+6. Open up your school's canvas page and select the option to always allow cross origin requests
 
 ## Troubleshooting
 **Q:** Pressing escape causes a bunch of error popups