Update dependency launchdarkly-js-client-sdk to ^3.9.0 (main) (elastic#235161)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[launchdarkly-js-client-sdk](https://redirect.github.com/launchdarkly/js-client-sdk)
| dependencies | minor | [`^3.8.1` ->
`^3.9.0`](https://renovatebot.com/diffs/npm/launchdarkly-js-client-sdk/3.8.1/3.9.0)
|

---

### Release Notes

<details>
<summary>launchdarkly/js-client-sdk
(launchdarkly-js-client-sdk)</summary>

###
[`v3.9.0`](https://redirect.github.com/launchdarkly/js-client-sdk/blob/HEAD/CHANGELOG.md#390-2025-09-09)

[Compare
Source](https://redirect.github.com/launchdarkly/js-client-sdk/compare/3.8.1...3.9.0)

##### Features

- Add experimental debug override functionality.
([9af8be9](https://redirect.github.com/launchdarkly/js-client-sdk/commit/9af8be91e2167cfd3369c0fffe0330a404cf9404))
- Add experimental debug override functionality.
([9fcac21](https://redirect.github.com/launchdarkly/js-client-sdk/commit/9fcac210e1152160d8b940383a8a85035b06a467))
- Add experimental debug override functionality.
([#&elastic#8203;326](https://redirect.github.com/launchdarkly/js-client-sdk/issues/326))
([9af8be9](https://redirect.github.com/launchdarkly/js-client-sdk/commit/9af8be91e2167cfd3369c0fffe0330a404cf9404))

</details>

---

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---

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---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4xMDcuMCIsInVwZGF0ZWRJblZlciI6IjM5LjEwNy4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJUZWFtOkNvcmUiLCJUZWFtOlNlY3VyaXR5IiwiYmFja3BvcnQ6cHJldi1tYWpvciIsImJhY2twb3J0OnByZXYtbWlub3IiLCJyZWxlYXNlX25vdGU6c2tpcCJdfQ==-->

---------

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>
Co-authored-by: kibanamachine <[email protected]>
Co-authored-by: Jean-Louis Leysens <[email protected]>

Author: 3 people

package.json

@@ -1293,7 +1293,7 @@
     "kea": "^2.6.0",
     "langchain": "^0.3.15",
     "langsmith": "^0.3.7",
-    "launchdarkly-js-client-sdk": "^3.8.1",
+    "launchdarkly-js-client-sdk": "^3.9.0",
     "load-json-file": "^6.2.0",
     "lodash": "^4.17.21",
     "lru-cache": "^11.2.1",

yarn.lock

@@ -24055,18 +24055,18 @@ [email protected]:
   resolved "https://registry.yarnpkg.com/launchdarkly-eventsource/-/launchdarkly-eventsource-2.2.0.tgz#dcabc7264d9dee05a60dcf5fca9fd0cefcc82d22"
   integrity sha512-u38fYlLSq/m6oFz0MS1/76Sj2xzlYhTKZ+sf/vju6PA86PMc6fPlY5k8CdU79edLXjNwsvIQTDvDNy3llDqB8A==
 
-launchdarkly-js-client-sdk@^3.8.1:
-  version "3.8.1"
-  resolved "https://registry.yarnpkg.com/launchdarkly-js-client-sdk/-/launchdarkly-js-client-sdk-3.8.1.tgz#1bcc5beb00082f752f6fe041e15482e9f42ba765"
-  integrity sha512-Y05FXM8FAXAMbbJqeI+ffr6a4m2M/TBUccgI9ejWPSxQS+/b2t+FBWZzfmc7wXuOOYzgGkpHHfQ6bFDU9NKPWQ==
+launchdarkly-js-client-sdk@^3.9.0:
+  version "3.9.0"
+  resolved "https://registry.yarnpkg.com/launchdarkly-js-client-sdk/-/launchdarkly-js-client-sdk-3.9.0.tgz#92a769389c495ff87035540e79c15fe3551deb3d"
+  integrity sha512-uPL9il6dOZrVQqEcpjDYc2c7HtBTlKpLJb1Q0187i4UokBVZwBXWKjTnNk9hkwaDD5PGD4puoe7POikrR8ACwQ==
   dependencies:
     escape-string-regexp "^4.0.0"
-    launchdarkly-js-sdk-common "5.7.1"
+    launchdarkly-js-sdk-common "5.8.0"
 
-launchdarkly-js-sdk-common@5.7.1:
-  version "5.7.1"
-  resolved "https://registry.yarnpkg.com/launchdarkly-js-sdk-common/-/launchdarkly-js-sdk-common-5.7.1.tgz#7f3d6a107ca6c6ecdd60ec7d3c4bf002e0502bf1"
-  integrity sha512-RFFeoYVL764zarFpU16lDt1yHzUCt0rnYYKlX5LLtZ5Nhq+2fzE33xRolP/sjxAYVInD0o5z6jKTlDe8gtcDYg==
+launchdarkly-js-sdk-common@5.8.0:
+  version "5.8.0"
+  resolved "https://registry.yarnpkg.com/launchdarkly-js-sdk-common/-/launchdarkly-js-sdk-common-5.8.0.tgz#fa5f35668ceb9fdb884cf4ddf025b156d914cbfa"
+  integrity sha512-9X70K3kN1fuR6ZnRudkH7etMgFhi3sEU0mnJ+y2nhID+DpfkNDVnYUGnUs8/s4tsSDs7Q7Gpm4qnr3oqOqT9+A==
   dependencies:
     base64-js "^1.3.0"
     fast-deep-equal "^2.0.1"