build(deps): bump i18next-fs-backend from 2.6.1 to 2.6.4 in /webapp-form

[dependabot]

Bumps i18next-fs-backend from 2.6.1 to 2.6.4.

Changelog

Sourced from i18next-fs-backend's changelog.

2.6.4

Security release — all issues found via an internal audit. See published advisory GHSA-8847-338w-5hcj.

• security: refuse to build filesystem paths when lng or ns values contain .., path separators (/, \), control characters, prototype keys (__proto__ / constructor / prototype), or exceed 128 chars. Prevents arbitrary filesystem read / write via attacker-controlled language-code values. Any legitimate i18next language-code shape (BCP-47-like, underscores, hyphens, dots, +-joined multi-language requests) is still accepted (GHSA-8847-338w-5hcj)
• docs: new "Security considerations" README section — documents the filesystem-path sanitiser and clarifies the trust model around .js/.ts locale files (their content is eval-ed, so they must be treated as code). The eval behaviour itself is retained: dynamic expressions in .js/.ts locale files are an intentional feature, and safe replacements like import() are async-only and not viable for this sync-capable code path.
• chore: ignore .env* and *.pem/*.key files in .gitignore.

2.6.3

• use own interpolation function instead of relying on i18next's interpolator

Commits

• 7f62307 2.6.4
• adf8a30 security: hardening for 2.6.4
• 3bd0132 update deps
• fd1616f Bump fastify from 5.3.2 to 5.8.5 in /example/fastify (#67)
• 8b6a5ba 2.6.3
• 957635d use own interpolation function
• 2771083 2.6.2
• 2cd2c20 use own interpolation function
• See full diff in compare view

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