[8.17] Update dependency deepmerge to ^4.3.1 (main) (#206165) (#214009)

# Backport

This will backport the following commits from `main` to `8.17`:
- [Update dependency deepmerge to ^4.3.1 (main)
(#206165)](https://github.com/elastic/kibana/pull/206165)

<!--- Backport version: 9.6.6 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

<!--BACKPORT
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->\n`^4.3.1`](https://renovatebot.com/diffs/npm/deepmerge/4.3.1/4.3.1)
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any time (no schedule defined),\nAutomerge - At any time (no schedule
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manually once you\nare satisfied.\n\n♻ **Rebasing**: Whenever PR becomes
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Close this PR and you won't be reminded about this
update\nagain.\n\n---\n\n- [ ] If you want to rebase/retry this PR,
check\nthis box\n\n---\n\nThis PR has been generated by
[Renovate\nBot](https://redirect.github.com/renovatebot/renovate).\n\n\n\nCo-authored-by:
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|\n\n---\n\n### Configuration\n\n📅 **Schedule**: Branch creation - At
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manually once you\nare satisfied.\n\n♻ **Rebasing**: Whenever PR becomes
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Close this PR and you won't be reminded about this
update\nagain.\n\n---\n\n- [ ] If you want to rebase/retry this PR,
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[Renovate\nBot](https://redirect.github.com/renovatebot/renovate).\n\n\n\nCo-authored-by:
elastic-renovate-prod[bot]
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package.json

@@ -1117,7 +1117,7 @@
     "d3-transition": "^3.0.1",
     "dedent": "^0.7.0",
     "deep-freeze-strict": "^1.1.1",
-    "deepmerge": "^4.2.2",
+    "deepmerge": "^4.3.1",
     "del": "^6.1.0",
     "diff": "^5.1.0",
     "dotenv": "^16.4.5",