docs: add demo video to Web Callouts changelog and docs page#3159

jannikmaierhoefer wants to merge 3 commits into

langfuse:mainlangfuse/langfuse-docs:mainfrom

jannikmaierhoefer:feature-launch/2026-06-19-web-callouts-changelogjannikmaierhoefer/langfuse-docs:feature-launch/2026-06-19-web-callouts-changelogCopy head branch name to clipboard