Editor: Use in/decrementors in wp_tinycolor_hue_to_rgb().

Replaces `+=` and `-=` with `++$t` and `--$t` (in/decrementors) within the `wp_tinycolor_hue_to_rgb()`. 

Why? For performance: in/decrementors are more performant than an assignment with a calculation.

References:
* https://www.php.net/manual/en/language.operators.increment.php
* WordPress/gutenberg#44551

Follow-up to [50929].

Props jrf, czapla, antonvlasenko, aristath, mamaduka.
See #57527. 
Built from https://develop.svn.wordpress.org/trunk@55140


git-svn-id: http://core.svn.wordpress.org/trunk@54673 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/block-supports/duotone.php

@@ -130,10 +130,10 @@ function wp_tinycolor_rgb_to_rgb( $rgb_color ) {
  */
 function wp_tinycolor_hue_to_rgb( $p, $q, $t ) {
 	if ( $t < 0 ) {
-		$t += 1;
+		++$t;
 	}
 	if ( $t > 1 ) {
-		$t -= 1;
+		--$t;
 	}
 	if ( $t < 1 / 6 ) {
 		return $p + ( $q - $p ) * 6 * $t;

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-alpha-55139';
+$wp_version = '6.2-alpha-55140';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.