Clean-up for release 5.4.0

[afs]

Preparation for Jena 5.4.0.

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[Copilot]

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Files not reviewed (2)

• jena-db/pom.xml: Language not supported
• jena-langtag/pom.xml: Language not supported

Comments suppressed due to low confidence (2)

jena-text/src/test/java/org/apache/jena/query/text/TestTextMultilingualEnhancements.java:63

• [nitpick] Verify that the removal of the explicit class loading and subclass definitions does not negatively affect the test setup or outcomes.

[] ja:loadClass    "org.apache.jena.query.text.TextQuery" .

jena-text/src/test/java/org/apache/jena/query/text/TestTextMultilingualEnhancements.java:93

• Ensure that the updated language tag format ('en-001') is applied consistently across all test cases, including label definitions and query invocations.

      [ text:addLang "en-001" ;