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

This MR contains the following updates:

Package	Type	Update	Change
nodemailer (source)	dependencies	patch	6.9.14 -> 6.9.15

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Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

nodemailer/nodemailer (nodemailer)

v6.9.15

Compare Source

Bug Fixes

• Fix memory leak (#​1667) (baa28f6)
• mime: Added GeoJSON closes #​1637 (#​1665) (79b8293)

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