Fix: Address Sonar Blocker issues

[DrSatyr]

No description provided.

[Copilot]

Pull Request Overview

This PR addresses Sonar blocker issues by updating test cases to accurately validate schema differences.

• In SchemaDiffTest.java, the test now verifies changes in property types rather than default values.
• In AllOfOneOfDiffTest.java, the assertion is modified to use a clear boolean check with isTrue().

Reviewed Changes

Copilot reviewed 2 out of 4 changed files in this pull request and generated no comments.

File	Description
core/src/test/java/org/openapitools/openapidiff/core/SchemaDiffTest.java	Updated test references and assertions to verify type changes in schema properties.
core/src/test/java/org/openapitools/openapidiff/core/AllOfOneOfDiffTest.java	Revised the assertion for core changes to use .isTrue() for clearer boolean validation.

Files not reviewed (2)

• core/src/test/resources/schemaDiff/schema-props-type-handling-1.yaml: Language not supported
• core/src/test/resources/schemaDiff/schema-props-type-handling-2.yaml: Language not supported