Update tycho.version to v4.0.4

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.eclipse.tycho:tycho-p2-plugin (source)	4.0.3 -> 4.0.4
org.eclipse.tycho:tycho-buildtimestamp-jgit (source)	4.0.3 -> 4.0.4
org.eclipse.tycho:tycho-packaging-plugin (source)	4.0.3 -> 4.0.4
org.eclipse.tycho:tycho-source-plugin (source)	4.0.3 -> 4.0.4
org.eclipse.tycho:target-platform-configuration (source)	4.0.3 -> 4.0.4
org.eclipse.tycho:tycho-maven-plugin (source)	4.0.3 -> 4.0.4

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