chore(main): release 6.6.0 (#223)

🤖 I have created a release *beep* *boop*
---


##
[6.6.0](6.5.2...6.6.0)
(2025-04-08)


### Features

* Include instance ID header across API requests
([#221](#221))
([4f87f4c](4f87f4c))


### Miscellaneous Chores

* Add user agent to .sdk_metadata.json
([#224](#224))
([cffa148](cffa148))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

.github/actions/build-docs/action.yml

@@ -17,4 +17,4 @@ runs:
           --ignore-tags psalm-return \
           --visibility public \
           --defaultpackagename "LaunchDarkly" \
-          --title "LaunchDarkly PHP SDK 6.5.2" # x-release-please-version
+          --title "LaunchDarkly PHP SDK 6.6.0" # x-release-please-version

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "6.5.2"
+  ".": "6.6.0"
 }

CHANGELOG.md

@@ -2,6 +2,18 @@
 
 All notable changes to the LaunchDarkly PHP SDK will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
 
+## [6.6.0](https://github.com/launchdarkly/php-server-sdk/compare/6.5.2...6.6.0) (2025-04-08)
+
+
+### Features
+
+* Include instance ID header across API requests ([#221](https://github.com/launchdarkly/php-server-sdk/issues/221)) ([4f87f4c](https://github.com/launchdarkly/php-server-sdk/commit/4f87f4cd37bdf93b61f8c9270d3d5821decf8b1b))
+
+
+### Miscellaneous Chores
+
+* Add user agent to .sdk_metadata.json ([#224](https://github.com/launchdarkly/php-server-sdk/issues/224)) ([cffa148](https://github.com/launchdarkly/php-server-sdk/commit/cffa148695755d45f2dd2b1fa1dd577133f22d8e))
+
 ## [6.5.2](https://github.com/launchdarkly/php-server-sdk/compare/6.5.1...6.5.2) (2025-03-25)
 
 

src/LaunchDarkly/LDClient.php

@@ -40,7 +40,7 @@ class LDClient
      * The current SDK version.
      * @var string
      */
-    const VERSION = '6.5.2'; // x-release-please-version
+    const VERSION = '6.6.0'; // x-release-please-version
 
     protected string $_sdkKey;
     protected string $_baseUri;