JS-1605 Fix licenses

[zglicz]

Part of

[hashicorp-vault-sonar-prod]

JS-1605

[sonar-review-alpha]

Summary

This PR corrects license headers across four Java files in the Maven plugin. The changes fix three issues:

1. Copyright date: Removes the invalid year range "2025-2025" and keeps just "SonarSource Sàrl" without specific years
2. License statement: Removes "This program is free software;" since this project uses a Source-Available license, not a free software license
3. Entity name consistency: Changes "SonarSource SA" to "SonarSource Sàrl" to match the copyright holder name above it

The license statement is also slightly reworded for clarity but maintains the same legal meaning.

What reviewers should know

All four files receive identical changes to their license headers:

• ChecksumException.java
• CompressMojo.java
• DownloadRuntimesMojo.java
• RuntimeFlavor.java

Only the file headers are modified; no code logic is affected. These are purely documentation/license corrections.

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[sonar-review-alpha]

LGTM! ✅

Clean, mechanical change — license headers are correctly updated across all four files with no functional impact.

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[sonarqube-next]

Quality Gate passed for 'NodeJS Maven Plugin'

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
0 Dependency risks
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarQube