docs: Fix a few typos

[timgates42]

There are small typos in:

• tests/frontend/viewport_toggle_controller_test.js
• warehouse/email/ses/models.py
• warehouse/legacy/api/json.py
• warehouse/rate_limiting/init.py

Fixes:

• Should read vulnerabilities rather than vulnerabilties.
• Should read unverified rather than unverfied.
• Should read starting rather than satarting.
• Should read skip rather than skipp.

Semi-automated pull request generated by https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md

[di]

Hi, are you able to include whatever tool detected these to our linting jobs as well?

[timgates42]

I have tried this in the past with some repositories and its met with some opposition - It uses aspell which isn't a pure python linter and so some developers have been against it as it make local checking of their pull requests have a non python dependency - That said if that isn't an issue here I can add a PR for consideration.

[miketheman]

Related: #11568