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

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();
```

Author: nik9000

docs/java-api/docs/update.asciidoc

@@ -22,7 +22,9 @@ Or you can use `prepareUpdate()` method:
 [source,java]
 --------------------------------------------------
 client.prepareUpdate("ttl", "doc", "1")
-        .setScript(new Script("ctx._source.gender = \"male\"" <1> , ScriptService.ScriptType.INLINE, null, null))
+        .setScript(new Script(
+            "ctx._source.gender = \"male\"", <1>
+            ScriptService.ScriptType.INLINE, null, null))
         .get();
 
 client.prepareUpdate("ttl", "doc", "1")