parsing of reproducible builds 'project.build.outputTimestamp' cannot handle default dateFormat

Describe the bug (required)

in https://maven.apache.org/guides/mini/guide-reproducible-builds.html it is mentioned that you could do <project.build.outputTimestamp>${git.commit.time}</project.build.outputTimestamp> and this is IMHO indeed a neat idea.

If you do so, however, you'll get

[ERROR] Failed to execute goal io.github.git-commit-id:git-commit-id-maven-plugin:6.0.0:revision (get-the-git-infos) on project mautstation: Invalid 'project.build.outputTimestamp' value '2023-11-30T09:17:06+0100': Unparseable date: "2023-11-30T09:17:06+0100" -> [Help 1]

This is because the defaullt dateFormat is yyyy-MM-dd'T'HH:mm:ssZ but parseOutputTimestamp only tries to parse the format yyyy-MM-dd'T'HH:mm:ssXXX

It can be work-arounded by specifying the configuration <dateFormat>yyyy-MM-dd'T'HH:mm:ssXXX</dateFormat> but this shouldnt be neccessary.

Tell us about your plugin configuration (required)

		<plugin>
			<groupId>io.github.git-commit-id</groupId>
			<artifactId>git-commit-id-maven-plugin</artifactId>
			<version>6.0.0</version>
			<executions>
				<execution>
					<id>get-the-git-infos</id>
					<goals>
						<goal>revision</goal>
					</goals>
				</execution>
			</executions>
			<configuration>
				<generateGitPropertiesFile>true</generateGitPropertiesFile>
			</configuration>
		</plugin>

Tell us about the Plugin version used (required)

6.0.0

Tell us about the Maven version used (required)

mvn --version
Apache Maven 3.8.1 (05c21c65bdfed0f71a2f2ada8b84da59348c4c5d)
Maven home: C:\Users\chris\AppData\Local\Programs\IntelliJ IDEA Ultimate\plugins\maven\lib\maven3
Java version: 17.0.2, vendor: Oracle Corporation, runtime: C:\java\openjdk-17.0.2
Default locale: de_DE, platform encoding: UTF-8
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"

Steps to Reproduce (required)

just configure the property <project.build.outputTimestamp>${git.commit.time}</project.build.outputTimestamp> in the POM

Are there any stacktraces or any error messages? (required)

Caused by: pl.project13.core.GitCommitIdExecutionException: Invalid 'project.build.outputTimestamp' value '2023-11-30T09:17:06+0100'
    at pl.project13.maven.git.GitCommitIdMojo.parseOutputTimestamp (GitCommitIdMojo.java:1511)
    at pl.project13.maven.git.GitCommitIdMojo$2.getReproducibleBuildOutputTimestamp (GitCommitIdMojo.java:1336)
    at pl.project13.core.GitCommitIdPlugin.loadBuildData (GitCommitIdPlugin.java:335)
    at pl.project13.core.GitCommitIdPlugin.runPlugin (GitCommitIdPlugin.java:295)
    at pl.project13.maven.git.GitCommitIdMojo.execute (GitCommitIdMojo.java:1453)

Is there a (public) project where this issue can be reproduced? (optional)

No response

Your Environment (optional)

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Context (optional)

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