[FLINK-25976][connectors/kinesis] Updating the default number of in f…

[CrynetLogistics]

…light records to 50

What is the purpose of the change

Updating default values for KinesisDataStreams Sink

Brief change log

Updated default values for KinesisDataStreams Sink

Verifying this change

trivial chg

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (yes / no)n
• The public API, i.e., is any changed class annotated with @Public(Evolving): (yes / no)n
• The serializers: (yes / no / don't know)n
• The runtime per-record code paths (performance sensitive): (yes / no / don't know)n
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / no / don't know)n
• The S3 file system connector: (yes / no / don't know)n

Documentation

• Does this pull request introduce a new feature? (yes / no)n
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)jdocs

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Last check on commit 10774e6 (Mon Feb 07 20:07:39 UTC 2022)

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CI report:

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[dannycranmer]

LGTM merged c0594583c