fix(#167): "using $this when not in object context"

Author: tobimori

README.md

@@ -29,7 +29,7 @@
 
 If you're looking to use Kirby SEO with Kirby 5 or newer, please install the Alpha version of the plugin:
 
-```composer require tobimori/kirby-seo:^2.0.0-alpha.7```
+```composer require tobimori/kirby-seo:^2.0.0-alpha.8```
 
 ## Contributing
 

classes/IndexNow.php

@@ -98,7 +98,7 @@ public static function send(array $urls): bool
 		$basePath = '';
 		if ($path && $path !== '/') {
 			// find the base path by comparing with site url
-			$siteUrl = $this->page->site()->url();
+			$siteUrl = App::instance()->site()->url();
 			$siteParsed = parse_url($siteUrl);
 			$basePath = $siteParsed['path'] ?? '';
 		}

composer.json

@@ -2,7 +2,7 @@
 	"name": "tobimori/kirby-seo",
 	"description": "The default choice for SEO on Kirby: Implement technical SEO & Meta best practices with ease and provide an easy-to-use editor experience",
 	"type": "kirby-plugin",
-	"version": "2.0.0-alpha.7",
+	"version": "2.0.0-alpha.8",
 	"license": "proprietary",
 	"homepage": "https://github.com/tobimori/kirby-seo#readme",
 	"authors": [