chore: update flint to 0.20.4#2045

zeitlinger wants to merge 7 commits intoprometheus:mainprometheus/client_java:mainfrom

zeitlinger:codex/flint-0.20.4-rollout-20260423zeitlinger/client_java:codex/flint-0.20.4-rollout-20260423Copy head branch name to clipboard