Add changelog entry

pkgs/test/CHANGELOG.md

diff --git a/pkgs/test/CHANGELOG.md b/pkgs/test/CHANGELOG.md
index 04ef333..68519d4 100644
--- a/pkgs/test/CHANGELOG.md
+++ b/pkgs/test/CHANGELOG.md
@@ -4,6 +4,7 @@
 * Increase SDK constraint to ^3.5.0-311.0.dev.
 * Support running Node.js tests compiled with dart2wasm.
 * Allow `firefox` or `firefox-bin` executable name on macOS.
+* Use a DevTools URL instead of a defunct observatory URL.
 
 ## 1.25.8
 

pkgs/test_core/CHANGELOG.md

diff --git a/pkgs/test_core/CHANGELOG.md b/pkgs/test_core/CHANGELOG.md
index 6103110..34af12c 100644
--- a/pkgs/test_core/CHANGELOG.md
+++ b/pkgs/test_core/CHANGELOG.md
@@ -3,6 +3,7 @@
 * Fix dart2wasm tests on windows.
 * Increase SDK constraint to ^3.5.0-311.0.dev.
 * Allow passing additional arguments to `dart compile wasm`.
+* Use a DevTools URL instead of a defunct observatory URL.
 
 ## 0.6.5