wgSVGNativeRendering default should be false, not 'false'

Follow-up to I9647fdd72f868c821eb20f67b239826f23655a1c

Bug: T208578
Change-Id: I648521ed044ebd5aa68e5420d73d3c07ca87986f

docs/config-schema.yaml

@@ -1140,7 +1140,7 @@ config-schema:
             Don't read SVG metadata beyond this point.
             Default is 1024*256 bytes
     SVGNativeRendering:
-        default: 'false'
+        default: false
         type:
             - string
             - boolean

includes/MainConfigSchema.php

@@ -1950,7 +1950,7 @@ class MainConfigSchema {
 	 * @since 1.41
 	 */
 	public const SVGNativeRendering = [
-		'default' => 'false',
+		'default' => false,
 		'type' => 'string|boolean',
 	];
 

includes/config-schema.php

@@ -224,7 +224,7 @@ return [
 			'SVGConverterPath' => '',
 			'SVGMaxSize' => 5120,
 			'SVGMetadataCutoff' => 262144,
-			'SVGNativeRendering' => 'false',
+			'SVGNativeRendering' => false,
 			'SVGNativeRenderingSizeLimit' => 51200,
 			'MediaInTargetLanguage' => true,
 			'MaxImageArea' => 12500000,