Add GitHub Local Actions to README (#2588)

* Add GitHub Local Actions to README

Signed-off-by: Sanjula Ganepola <Sanjula.Ganepola@ibm.com>

* Remove trailing whitespace

Signed-off-by: Sanjula Ganepola <sanjulagane@gmail.com>

* Add line break after heading

Signed-off-by: Sanjula Ganepola <sanjulagane@gmail.com>

* Restore final new line

Signed-off-by: Sanjula Ganepola <sanjulagane@gmail.com>

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Signed-off-by: Sanjula Ganepola <Sanjula.Ganepola@ibm.com>
Signed-off-by: Sanjula Ganepola <sanjulagane@gmail.com>
Co-authored-by: Casey Lee <cplee@nektos.com>