Update Pages file limit: 100k files for paid plans

[yomna-shousha]

Summary

• Updates the Pages limits documentation to reflect the new 100k file limit for paid plans
• Clarifies that the 20,000 file limit applies to the Free plan
• Documents the PAGES_WRANGLER_MAJOR_VERSION=4 environment variable required to enable the increased limit

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/changelog/	@cloudflare/pm-changelogs, @cloudflare/pcx-technical-writing
/src/content/docs/pages/	@cloudflare/workers-docs, @GregBrimble, @WalshyDev, @aninibread, @irvinebroque, @cloudflare/pcx-technical-writing

[github-actions]

Preview URL: https://70232678.preview.developers.cloudflare.com
Preview Branch URL: https://yomna-pages-assets-increase.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/changelog/2025-01-22-pages-file-limit-increase/	https://yomna-pages-assets-increase.preview.developers.cloudflare.com/changelog/2025-01-22-pages-file-limit-increase/
https://developers.cloudflare.com/pages/platform/limits/	https://yomna-pages-assets-increase.preview.developers.cloudflare.com/pages/platform/limits/