Bump async from 2.5.0 to 2.6.4

Bumps [async](https://github.com/caolan/async) from 2.5.0 to 2.6.4.
- [Release notes](https://github.com/caolan/async/releases)
- [Changelog](https://github.com/caolan/async/blob/v2.6.4/CHANGELOG.md)
- [Commits](caolan/async@v2.5.0...v2.6.4)

---
updated-dependencies:
- dependency-name: async
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -14,7 +14,7 @@
  "license": "MIT",
  "dependencies": {
  "@aws-sdk/client-s3": "^3.171.0",
- "async": "^2.5.0",
+ "async": "^2.6.4",
  "config-weaver": "0.0.15",
  "couchdb-push": "^3.1.0",
  "elasticsearch": "^16.7.2",