docs: improve Kubernetes Kit configuration documentation (#4827) (CP: main)

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AI Language Review

The following issues require improvement in the Configuration document:

1. In the section "Hazelcast for Session Replication," the sentence "The service-name and service-port properties defines the endpoint..." should have "defines" changed to "define" to match the plural subject.

2. The note about Hazelcast's shutdown hook appears after an example using the .yaml configuration. It might be more contextually coherent to move this note before the examples to ensure that the reader does not miss this important information.

3. In the block note explaining Hazelcast's shutdown hook, the sentence "Spring takes care of automatically gracefully stop the Hazelcast instance..." should be revised to "Spring automatically takes care of gracefully stopping the Hazelcast instance..." for better clarity and grammar.

These changes will improve clarity and grammatical accuracy in the document.