Add changelog entries for chromium deprecation and arm64 support

Author: cderv

news/changelog-1.10.md

@@ -18,6 +18,11 @@ All changes included in 1.10:
 
 - ([#14281](https://github.com/quarto-dev/quarto-cli/issues/14281)): Avoid creating a duplicate `.quarto_ipynb` file on preview startup for single-file Jupyter documents.
 
+### `install`
+
+- ([#11877](https://github.com/quarto-dev/quarto-cli/issues/11877)): Add arm64 Linux support for `quarto install chrome-headless-shell` using Playwright CDN as download source, since Chrome for Testing has no arm64 Linux builds.
+- ([#11877](https://github.com/quarto-dev/quarto-cli/issues/11877)): Deprecate `quarto install chromium` — the command now transparently redirects to `chrome-headless-shell`. Use `chrome-headless-shell` instead, which always installs the latest stable Chrome (the legacy `chromium` installer pins an outdated Puppeteer revision that cannot receive security updates).
+
 ### `quarto create`
 
 - ([#14250](https://github.com/quarto-dev/quarto-cli/issues/14250)): Fix `quarto create` producing read-only files when Quarto is installed via system packages (e.g., `.deb`). Files copied from installed resources now have user-write permission ensured.