Correct spelling of programmatically in docs (typo)

[Opinion]

Reference; https://en.wiktionary.org/wiki/programatically -> https://en.wiktionary.org/wiki/programmatically

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Build-related changes
• Other, please describe: Correct a typo

Does this PR introduce a breaking change? (check one)

• Yes
• No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• It's submitted to the dev branch for v2.x (or to a previous version branch), not the master branch
• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
• All tests are passing: https://github.com/vuejs/vue/blob/dev/.github/CONTRIBUTING.md#development-setup
• New/updated tests are included

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

Other information:

Cheers! 🍺

[posva]

Thanks!

[vue-bot]

Hey @Opinion, thank you for your time and effort spent on this PR, contributions like yours help make Vue better for everyone. Cheers! 💚