Update dependency DNSCrypt/dnscrypt-proxy to v2.1.12

[klutchell-renovate]

This PR contains the following updates:

Package	Update	Change
DNSCrypt/dnscrypt-proxy	patch	2.1.11 -> 2.1.12

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Release Notes

DNSCrypt/dnscrypt-proxy (DNSCrypt/dnscrypt-proxy)

v2.1.12

Compare Source

• A new Weighted Power of Two (WP2) load balancing strategy has been
  implemented as the default, providing improved distribution across resolvers.
• An optional Prometheus metrics endpoint has been added for monitoring and
  observability.
• Memory usage for the cache has been reduced.
• The monitoring dashboard has received significant improvements including
  better security, performance optimizations, WebSocket rate limiting, and HTTP
  caching headers.
• The monitoring UI has been refined with stable sorting to prevent
  flickering, query type limitations, and improved scrolling behavior.
• Additional records in queries are now properly removed before forwarding.
• The simple view UI has been removed as it provided limited utility.

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