docs: fix incorrect feature flag name in migration build doc.

[Masa-Shin]

The migration guide currently lists COMPILER_FILTERS as a feature flag but to disable compiler support for filters, you must specify COMPILER_FILTER: false (not plural COMPILER_FILTERS) in compatConfig. Although the enum key for the feature is COMPILER_FILTERS (plural), the value string is singular so it would be more helpful to list the singular form.

[yyx990803]

Hmm, I think it's better to correct the enum value to match the key and the docs (the missing S was a mistake)

[Masa-Shin]

I think it's better to correct the enum value to match the key and the docs

I think that would be more ideal. I will fix it by the weekend.

[Masa-Shin]

Updated the PR to fix enum value.

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	89.3 kB	34 kB	30.6 kB
vue.global.prod.js	146 kB	53.2 kB	47.6 kB

Usages

Name	Size	Gzip	Brotli
createApp	49.7 kB	19.5 kB	17.8 kB
createSSRApp	53 kB	20.8 kB	19 kB
defineCustomElement	52 kB	20.2 kB	18.4 kB
overall	63.2 kB	24.4 kB	22.2 kB