chore(deps): bump guzzlehttp PHP dependencies

Output of composer update:
  - Upgrading guzzlehttp/guzzle (7.12.0 => 7.12.1)
  - Upgrading guzzlehttp/psr7 (2.12.0 => 2.12.1)
  - Upgrading roave/security-advisories (dev-latest 6b43b34 => dev-latest d59bd7f)

Author: phil-davis

changelog/unreleased/PHPdependencies20260225onward

@@ -12,11 +12,11 @@ The following have been updated:
 
  * google/auth (v1.50.0 to v1.51.0)
 
- * guzzlehttp/guzzle (7.10.0 to 7.12.0)
+ * guzzlehttp/guzzle (7.10.0 to 7.12.1)
 
  * guzzlehttp/promises (2.3.0 to 2.4.1)
 
- * guzzlehttp/psr7 (2.8.0 to 2.12.0)
+ * guzzlehttp/psr7 (2.8.0 to 2.12.1)
 
  * laravel/serializable-closure (v2.0.10 to v2.0.13)
 
@@ -55,3 +55,4 @@ https://github.com/owncloud/core/pull/41613
 https://github.com/owncloud/core/pull/41619
 https://github.com/owncloud/core/pull/41626
 https://github.com/owncloud/core/pull/41635
+https://github.com/owncloud/core/pull/41639