Docs: Drop inline callouts from the java API (6.5) (#39932)

[nik9000]

There is a single example in the Java API docs that contains an inline
callout that is incompatible with Asciidoctor:

client.prepareUpdate("ttl", "doc", "1")
        .setScript(new Script(
            "ctx._source.gender = \"male\"" <1> , ScriptService.ScriptType.INLINE, null, null))
        .get();

This rewrites the example to use an Asciidoctor compatible end of line
callout. It also looks nicer to me because it fits better on the page.

client.prepareUpdate("ttl", "doc", "1")
        .setScript(new Script(
            "ctx._source.gender = \"male\"", <1>
            ScriptService.ScriptType.INLINE, null, null))
        .get();