docs: sync Playwright Reporter changelog v1.4.2 (#179)

Co-authored-by: checkly-release-bot[bot] <2754512+checkly-release-bot[bot]@users.noreply.github.com>

Author: checkly-release-bot[bot]

detect/testing/playwright-reporter-changelog.mdx

@@ -13,6 +13,16 @@ Learn more about:
 
 ## Full release history
 
+<Update label="v1.4.2" tags={["February 2026"]}>
+  **Fixed**
+
+  - Missing credentials now show a clean warning instead of a stack trace. Other reporters continue working normally.
+
+  **Changed**
+
+  - Improved summary table format.
+</Update>
+
 <Update label="v1.4.1" tags={["February 2026"]}>
   **Critical Bug Fix**