Docs: Add missing full stop in WP_Duotone class method DocBlocks.

Follow-up to [56101].

Props dhruval04.
Fixes #61439.

git-svn-id: https://develop.svn.wordpress.org/trunk@58414 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-duotone.php

@@ -215,7 +215,7 @@ private static function colord_parse_hue( $value, $unit = 'deg' ) {
 	}
 
 	/**
-	 * Parses any valid Hex3, Hex4, Hex6 or Hex8 string and converts it to an RGBA object
+	 * Parses any valid Hex3, Hex4, Hex6 or Hex8 string and converts it to an RGBA object.
 	 *
 	 * Direct port of colord's parseHex function.
 	 *
@@ -286,7 +286,7 @@ private static function colord_clamp_rgba( $rgba ) {
 	}
 
 	/**
-	 * Parses a valid RGB[A] CSS color function/string
+	 * Parses a valid RGB[A] CSS color function/string.
 	 *
 	 * Direct port of colord's parseRgbaString function.
 	 *