deps(deps): update dependency nginx/nginx to v1.31.6

[renovate]

This PR contains the following updates:

Package	Update	Change
nginx/nginx	patch	1.31.5 → 1.31.6

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Release Notes

nginx/nginx (nginx/nginx)

v1.31.6

Compare Source

nginx-1.31.6 mainline version has been released, with fixes for buffer overflow vulnerability when using ngx_http_v3_module (CVE-2026-90439).

See official CHANGES on nginx.org.

Below is a release summary generated by GitHub.

What's Changed

• man page updates by @​pluknet in #​1727
• Handle predicate location variable error by @​arut in #​1750
• Handle nested location lookup error by @​arut in #​1751
• Control API: fixed socket inheritance on binary upgrade by @​pluknet in #​1760
• Geo: check binary base CRC32 before relocation by @​pluknet in #​1739
• QUIC compatibility layer fix by @​pluknet in #​1769
• nginx-1.31.6-RELEASE by @​pluknet in #​1770

Full Changelog: nginx/nginx@release-1.31.5...release-1.31.6

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