build(deps): update dependency org.codehaus.mojo:exec-maven-plugin to v3.4.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.codehaus.mojo:exec-maven-plugin (source)	3.3.0 -> 3.4.0

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Release Notes

mojohaus/exec-maven-plugin (org.codehaus.mojo:exec-maven-plugin)

### [`v3.4.0`](https://togithub.com/mojohaus/exec-maven-plugin/releases/tag/3.4.0) [Compare Source](https://togithub.com/mojohaus/exec-maven-plugin/compare/3.3.0...3.4.0) ##### 🚀 New features and improvements - Allow `` to be specified for the exec:exec goal ([#​432](https://togithub.com/mojohaus/exec-maven-plugin/pull/432)) [@​sebthom](https://togithub.com/sebthom) ##### 🐛 Bug Fixes - Do not get UPPERCASE env vars ([#​427](https://togithub.com/mojohaus/exec-maven-plugin/pull/427)) [@​wheezil](https://togithub.com/wheezil) ##### 📦 Dependency updates - Bump org.codehaus.mojo:mojo-parent from 82 to 84 ([#​434](https://togithub.com/mojohaus/exec-maven-plugin/pull/434)) [@​dependabot](https://togithub.com/dependabot) - Bump org.codehaus.plexus:plexus-xml from 3.0.0 to 3.0.1 ([#​431](https://togithub.com/mojohaus/exec-maven-plugin/pull/431)) [@​dependabot](https://togithub.com/dependabot) ##### 👻 Maintenance - Remove Log4j 1.2.x from ITs ([#​437](https://togithub.com/mojohaus/exec-maven-plugin/pull/437)) [@​slawekjaranowski](https://togithub.com/slawekjaranowski) ##### 🔧 Build - Use Maven 3.9.7 and 4.0.0-beta-3 ([#​433](https://togithub.com/mojohaus/exec-maven-plugin/pull/433)) [@​slawekjaranowski](https://togithub.com/slawekjaranowski)

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