SDK - Fixed the capitalization in _python_function_name_to_component_name

[Ark-kun]

When auto-creating components from functions I want the generated component names to look "human". For example "def do_something()" should result in "Do something".
I thought that capitalize was doing exactly what I want, but it turned out that its behavior is different. It lowers the case of all subsequent characters, transforming "CsvExampleGen" to "Csvexamplegen".
This PR fixes that issue and only changes the first character.

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This change is 

[numerology]

Generally lgtm modulo one comment.
May I ask what's the purpose of this change?

[numerology]

/lgtm

[Ark-kun]

what's the purpose of this change?

When auto-creating components from functions I want the generated component names to look "human". For example "def do_something()" should result in "Do something".
I thought that capitalize was doing exactly what I want, but it turned out that its behavior is different. It lowers the case of all subsequent characters, transforming "CsvExampleGen" to "Csvexamplegen". This PR fixes that issue and only changes the first character.

[Ark-kun]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Ark-kun

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[Ark-kun]

/retest