Duplicated `properties` tag in the `pom` breaks publishing

[github-actions]

See https://github.com/scala/scala3/actions/runs/8430164281

[Gedochao]

2024-03-26 05:12:26.505+0100 error [SonatypeClient] [close] Failed  - (SonatypeClient.scala:181)
2024-03-26 05:12:26.506+0100 error [SonatypeClient] Activity name:close, started:2024-03-26T04:11:46.157Z, stopped:2024-03-26T04:12:22.966Z  - (SonatypeClient.scala:469)
2024-03-26 05:12:26.508+0100 error [SonatypeClient]     Failed: sources-staging, failureMessage:Illegal POM: /org/scala-lang/scala3-library_sjs1_3/3.4.2-RC1-bin-20240325-198750b-NIGHTLY/scala3-library_sjs1_3-3.4.2-RC1-bin-20240325-198750b-NIGHTLY.pom Duplicated tag: 'properties' (position: START_TAG seen ...</properties>\n    <properties>... @96:17)   - (SonatypeClient.scala:387)
2024-03-26 05:12:26.508+0100 error [SonatypeClient]     Failed: javadoc-staging, failureMessage:Illegal POM: /org/scala-lang/scala3-library_sjs1_3/3.4.2-RC1-bin-20240325-198750b-NIGHTLY/scala3-library_sjs1_3-3.4.2-RC1-bin-20240325-198750b-NIGHTLY.pom Duplicated tag: 'properties' (position: START_TAG seen ...</properties>\n    <properties>... @96:17)   - (SonatypeClient.scala:387)
2024-03-26 05:12:26.508+0100 error [SonatypeClient]     Failed: pom-staging, failureMessage:Invalid POM: /org/scala-lang/scala3-library_sjs1_3/3.4.2-RC1-bin-20240325-198750b-NIGHTLY/scala3-library_sjs1_3-3.4.2-RC1-bin-20240325-198750b-NIGHTLY.pom: Parsing Error: Duplicated tag: 'properties' (position: START_TAG seen ...</properties>\n    <properties>... @96:17)   - (SonatypeClient.scala:387)
2024-03-26 05:12:26.510+0100 error [Sonatype] [STAGE_FAILURE] Failed to close the repository.  - (Sonatype.scala:440)
Error: Process completed with exit code 1.

Seems like we have a duplicated properties tag in the pom.xml, which breaks publishing...
I see a likely culprit in 18b146b

@Kordyjan can you have a look?