chore: merge duplicated changelog lines for guzzlehttp/psr7

Author: phil-davis

changelog/unreleased/PHPdependencies20260225onward

@@ -12,13 +12,11 @@ The following have been updated:
 
  * google/auth (v1.50.0 to v1.51.0)
 
- * guzzlehttp/psr7 (2.8.0 to 2.10.4)
-
  * guzzlehttp/guzzle (7.10.0 to 7.12.0)
 
  * guzzlehttp/promises (2.3.0 to 2.4.1)
 
- * guzzlehttp/psr7 (2.11.0 to 2.12.0)
+ * guzzlehttp/psr7 (2.8.0 to 2.12.0)
 
  * laravel/serializable-closure (v2.0.10 to v2.0.13)