chore: bump the security group across 4 directories with 2 updates

Bumps the security group with 1 update in the /examples/datadog/flask/cdk directory: [brace-expansion](https://github.com/juliangruber/brace-expansion).
Bumps the security group with 1 update in the /examples/datadog/expressjs/cdk directory: [brace-expansion](https://github.com/juliangruber/brace-expansion).
Bumps the security group with 1 update in the /examples/datadog/expressjs-streaming/lambda-asset/src directory: [proxy-addr](https://github.com/jshttp/proxy-addr).
Bumps the security group with 1 update in the /examples/datadog/expressjs-streaming/cdk directory: [brace-expansion](https://github.com/juliangruber/brace-expansion).


Updates `brace-expansion` from 1.1.11 to 1.1.21
- [Release notes](https://github.com/juliangruber/brace-expansion/releases)
- [Commits](juliangruber/brace-expansion@1.1.11...v1.1.21)

Updates `brace-expansion` from 2.0.1 to 2.1.7
- [Release notes](https://github.com/juliangruber/brace-expansion/releases)
- [Commits](juliangruber/brace-expansion@1.1.11...v1.1.21)

Updates `brace-expansion` from 1.1.11 to 1.1.21
- [Release notes](https://github.com/juliangruber/brace-expansion/releases)
- [Commits](juliangruber/brace-expansion@1.1.11...v1.1.21)

Updates `brace-expansion` from 2.0.1 to 2.1.7
- [Release notes](https://github.com/juliangruber/brace-expansion/releases)
- [Commits](juliangruber/brace-expansion@1.1.11...v1.1.21)

Updates `proxy-addr` from 2.0.7 to 2.0.8
- [Release notes](https://github.com/jshttp/proxy-addr/releases)
- [Changelog](https://github.com/jshttp/proxy-addr/blob/master/HISTORY.md)
- [Commits](jshttp/proxy-addr@v2.0.7...v2.0.8)

Updates `brace-expansion` from 1.1.11 to 1.1.21
- [Release notes](https://github.com/juliangruber/brace-expansion/releases)
- [Commits](juliangruber/brace-expansion@1.1.11...v1.1.21)

Updates `brace-expansion` from 2.0.1 to 2.1.7
- [Release notes](https://github.com/juliangruber/brace-expansion/releases)
- [Commits](juliangruber/brace-expansion@1.1.11...v1.1.21)

---
updated-dependencies:
- dependency-name: brace-expansion
  dependency-version: 1.1.21
  dependency-type: indirect
  dependency-group: security
- dependency-name: brace-expansion
  dependency-version: 2.1.7
  dependency-type: indirect
  dependency-group: security
- dependency-name: brace-expansion
  dependency-version: 1.1.21
  dependency-type: indirect
  dependency-group: security
- dependency-name: brace-expansion
  dependency-version: 2.1.7
  dependency-type: indirect
  dependency-group: security
- dependency-name: proxy-addr
  dependency-version: 2.0.8
  dependency-type: indirect
  dependency-group: security
- dependency-name: brace-expansion
  dependency-version: 1.1.21
  dependency-type: indirect
  dependency-group: security
- dependency-name: brace-expansion
  dependency-version: 2.1.7
  dependency-type: indirect
  dependency-group: security
...

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Author: dependabot[bot]