Modify spec file - unpin train-core

[poorndm]

Description

The latest version of the train-core gem (3.12.6) includes a fix for the issue present in version 3.12.5. We need to revert the changes made to pin the version for Ruby <= 3.1 in the omnibus and omnibus-software repositories.
Current Configuration:
if Gem::Version.new(RUBY_VERSION) <= Gem::Version.new("3.1.0")
s.add_dependency "train-core", "<3.12.5"

• train-core version 3.12.6 requires Ruby version >= 2.7.
• train-core version 3.12.5 required Ruby version >= 3.1.
  Hence Revert the pinned train-core version changes for Ruby <= 3.1 omnibus-software

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Related Issue

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (non-breaking change that does not add functionality or fix an issue)

Checklist:

• I have read the CONTRIBUTING document.
• I have run the pre-merge tests locally and they pass.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• If Gemfile.lock has changed, I have used --conservative to do it and included the full output in the Description above.
• All new and existing tests passed.
• All commits have been signed-off for the Developer Certificate of Origin.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud