Update CHANGELOG-7.0.md

Author: XWB

CHANGELOG-7.0.md

@@ -4,7 +4,7 @@ CHANGELOG for 7.x
 This changelog references the relevant changes (bug and security fixes) done
 in 7.x versions.
 
-### 7.2.0 (2026-xx-xx)
+### 7.2.0 (2026-06-01)
 * Added Elasticsearch 9 and Elastica 9 support.
 * `headers` client config is now applied via `Transport::setHeader()` so it works uniformly across Guzzle, Symfony HTTP Client, and elastic-transport's bundled Curl client.
 * `timeout` client config is now translated to `CURLOPT_TIMEOUT` at runtime when the active transport client is elastic-transport's bundled Curl — Guzzle/Symfony HTTP Client keep consuming the original `'timeout'` key as before.