[Node.js, Go] - Transactions page minor fixes

• In the Requirements section can we call it 'Couchbase Node.js SDK' instead of 'Couchbase Node.js client' (will need to do the same for Go).

• Code Block says Java instead of JavaScript / Typescript: https://docs.couchbase.com/nodejs-sdk/current/howtos/distributed-acid-transactions-from-the-sdk.html#key-value-reads (second example).

• (Node.js only) Probably a copy paste problem. Java methods should be removed.

And an example combining SELECTs and UPDATEs. It’s possible to call regular Java methods from the lambda, as shown here, permitting complex logic to be performed. Just remember that since the lambda may be called multiple times, so may the method.

• Query Performance Advice: 
  Maximize instead of maximise
   
   
• Use of “Reactive API “, probably a copy paste from Java?

Those using the reactive API to achieve concurrency should be aware that the converted Key-Value operations are subject to the same parallelism restrictions mentioned above,