Upgrade package nodemailer from 6.9.14 to 6.9.15

[palisadoes]

Rationale

1. This was previously attempted by the automated dependabot job but the PR tests failed.
2. This issue has been created to fix the issue as there may be multiple dependency requirements that need updating

This is a major revision upgrade and many files may need to be updated to the new syntax, functions, methods and classes

Task

1. Upgrade the package
2. Remove this package if it is:
   1. unused
   2. unnecessary. For example:
      1. the functionality can be maintained by using another package we are already using,
      2. If we are using only one function or class in the package you can consider replacing it with code that resides in this repository
      3. It is used by a feature that the end user is unlikely to ever use

Background Failing PRs

• chore(deps): bump nodemailer from 6.9.14 to 6.9.15 #2533
• https://github.com/PalisadoesFoundation/talawa-api/actions/runs/10880036849/job/30186030349?pr=2533

Release Note Details

Bumps nodemailer from 6.9.14 to 6.9.15.

Release notes

Sourced from nodemailer's releases.

v6.9.15

6.9.15 (2024-08-08)

Bug Fixes

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

Changelog

Sourced from nodemailer's changelog.

6.9.15 (2024-08-08)

Bug Fixes

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

Commits

• 81de9eb chore(master): release 6.9.15 [skip-ci] (#1668)
• 79b8293 fix(mime): Added GeoJSON closes #1637 (#1665)
• baa28f6 fix: Fix memory leak (#1667)
• See full diff in compare view

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[syedali237]

Can I be assigned this issue?