[Fundamentals] Update 2fa.mdx (#26390)

IAM change - Per current menu in the Cloudflare dash.

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Co-authored-by: Pedro Sousa <[email protected]>

Author: nenizera

src/content/docs/fundamentals/user-profiles/2fa.mdx

@@ -104,7 +104,8 @@ Regenerating your backup codes will invalidate your previous codes.
 
 2. Select **My Profile**.
 3. Select **Authentication**.
-4. Select **Regenerate** to generate and save a new set of two-factor backup codes.
+4. For **Two-Factor Authentication**, select **Manage**.
+5. For **Backup codes**, select **Regenerate** to generate and save a new set of two-factor backup codes.
 
 ## Disable two-factor authentication for your Cloudflare account