Refactor get-version

[ngonzalezpazFC]

Instead of capturing the first occurrence of the tag, which often points to the parent-pom in Maven architectures, it now identifies the project's specific version by targeting the second occurrence in the document hierarchy.

Logic Breakdown:

1. Tag Isolation: The grep "<version>" command scans the pom.xml and retrieves all lines containing versioning information, preserving their document order.
2. Stream Cleaning: Using sed -E 's/.*<version>(.*)<\/version>.*/\1/', the script applies a Regular Expression to strip XML tags and leading/trailing whitespace, isolating the raw version string (e.g., 1.1.0-SNAPSHOT).
3. Positional Selection: In a standard Maven POM with a parent, the first match is the Parent Version. The second match (sed -n '2p') is the Project Artifact Version.
4. Conditional Fallback: The script includes a safety check: if no second line exists (indicating a standalone project without a parent), it defaults to the first match (sed -n '1p').
5. Environment Integration: The resulting string is piped through xargs to ensure absolute character purity before being injected into the $GITHUB_ENV for downstream validation steps.

Close #2