Added extra size parameter to scatter plot example #1132

Job	Run time
Run pre-commit hooks	53s
Pytest on macos-latest with Python 3.6	3m 25s
Pytest on windows-latest with Python 3.6	18m 4s
Pytest on ubuntu-latest with Python 3.7	7m 11s
Pytest on ubuntu-latest with Python 3.9	13m 29s
Pytest on ubuntu-latest with Python 3.11	6m 21s
Pytest on macos-latest with Python 3.7	6m 56s
Pytest on macos-latest with Python 3.9	3m 24s
Pytest on macos-latest with Python 3.11	3m 3s
Pytest on windows-latest with Python 3.7	15m 21s
Pytest on windows-latest with Python 3.9	22m 31s
Pytest on windows-latest with Python 3.11	19m 0s
	1h 59m 38s

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