Fix tests (to reference the right ID for tracking ratio)

tests/phpunit/class-test-settings.php

@@ -129,7 +129,7 @@ public function test_settings_init__field_web_vitals_tracking_ratio() {
 		$this->assertSame( $field_name, $field['id'] );
 		$this->assertSame( 'Web Vitals Tracking Ratio', $field['title'] );
 
-		$this->assertSame( array( $this->settings->fields[5], 'render' ), $field['callback'] );
+		$this->assertSame( array( $this->settings->fields[2], 'render' ), $field['callback'] );
 
 		$this->assertSame(
 			array(
@@ -250,7 +250,7 @@ public function test_web_vitals_tracking_ratio_render__empty_options() {
 		$this->settings->settings_init();
 
 		ob_start();
-		$this->settings->fields[5]->render();
+		$this->settings->fields[2]->render();
 		$result = ob_get_contents();
 		ob_end_clean();
 
@@ -270,7 +270,7 @@ public function test_web_vitals_tracking_ratio_render__set_web_vitals_tracking_r
 		add_option( 'spt_settings', array( 'web_vitals_tracking_ratio' => 0.05 ) );
 
 		ob_start();
-		$this->settings->fields[5]->render();
+		$this->settings->fields[2]->render();
 		$result = ob_get_contents();
 		ob_end_clean();
 
@@ -291,7 +291,7 @@ public function test_web_vitals_tracking_ratio_render__theme_web_vitals_tracking
 		$this->settings->settings_init();
 
 		ob_start();
-		$this->settings->fields[5]->render();
+		$this->settings->fields[2]->render();
 		$result = ob_get_contents();
 		ob_end_clean();
 
@@ -318,7 +318,7 @@ function () {
 		);
 
 		ob_start();
-		$this->settings->fields[5]->render();
+		$this->settings->fields[2]->render();
 		$result = ob_get_contents();
 		ob_end_clean();