Updated documentation Specifying types for GradingPrimary attributes #1640

[sumana-2705]

Updated Documentation: Specify Types for GradingPrimary Attributes

Description:

This pull request updates the documentation for the GradingPrimary class in OpenColorIO to specify the expected types for its attributes, enhancing clarity for developers mentioned in the issue #1640

Changes Made: Added type specifications for the following attributes:

• brightness: GradingRGBM
• clampBlack: float
• clampWhite: float
• contrast: GradingRGBM
• exposure: GradingRGBM
• gain: GradingRGBM
• gamma: GradingRGBM
• lift: GradingRGBM
• offset: GradingRGBM
• pivot: float
• saturation: float

[linux-foundation-easycla[bot]]

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