Add the changelog entry

changelog.d/1463-dev-tool-updates.md

@@ -0,0 +1,4 @@
+- Update the development tools to Vite 6.4.4 and Puppeteer 25.16.0, which
+  clears the open npm advisories for the dev server and the browser test
+  tooling, and remove the unused local screenshot helper `scripts/shot-sink.mjs`
+  (samehkhamis, #1463).