fix(deps): update dependency nodemailer to v6.9.15 (#8224)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [nodemailer](https://nodemailer.com/)
([source](https://redirect.github.com/nodemailer/nodemailer)) |
[`6.9.14` ->
`6.9.15`](https://renovatebot.com/diffs/npm/nodemailer/6.9.14/6.9.15) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/nodemailer/6.9.15?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/nodemailer/6.9.15?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/nodemailer/6.9.14/6.9.15?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/nodemailer/6.9.14/6.9.15?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>nodemailer/nodemailer (nodemailer)</summary>

###
[`v6.9.15`](https://redirect.github.com/nodemailer/nodemailer/blob/HEAD/CHANGELOG.md#6915-2024-08-08)

[Compare
Source](https://redirect.github.com/nodemailer/nodemailer/compare/v6.9.14...v6.9.15)

##### Bug Fixes

- Fix memory leak
([#&#8203;1667](https://redirect.github.com/nodemailer/nodemailer/issues/1667))
([baa28f6](baa28f6596))
- **mime:** Added GeoJSON closes
[#&#8203;1637](https://redirect.github.com/nodemailer/nodemailer/issues/1637)
([#&#8203;1665](https://redirect.github.com/nodemailer/nodemailer/issues/1665))
([79b8293](79b8293ad5))

</details>

---

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---

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---

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yarn.lock

@@ -7067,9 +7067,9 @@ __metadata:
   linkType: hard
 
 "nodemailer@npm:^6.9.9":
-  version: 6.9.14
-  resolution: "nodemailer@npm:6.9.14"
-  checksum: 10c0/2542986849bc6ec2bf12fb7b72226da0ce9c6a0946216dea020d9eedee3ac1a4eb2413f59772a3ddd4bb9188d5ce859167a030c065719473f71319e052a319dc
+  version: 6.9.15
+  resolution: "nodemailer@npm:6.9.15"
+  checksum: 10c0/92493406310cb1bb0bac575d604b3c75b67e420e8af94711bd55cb012ee02d3bf6fda57c663d66c15bdd89acd5f9cd540922644b089617c6e191596536503b5b
   languageName: node
   linkType: hard