fixed a couple of new phpstan errors

src/entity/Entity.php

@@ -1645,6 +1645,7 @@ abstract class Entity{
 
 	/**
 	 * @return MetadataProperty[]
+	 * @phpstan-return array<int, MetadataProperty>
 	 */
 	final protected function getSyncedNetworkData(bool $dirtyOnly) : array{
 		$this->syncNetworkData($this->networkProperties);

src/entity/EntityDataHelper.php

@@ -45,6 +45,7 @@ final class EntityDataHelper{
 		if(!($yawPitch instanceof ListTag) or $yawPitch->getTagType() !== NBT::TAG_Float){
 			throw new \UnexpectedValueException("'Rotation' should be a List<Float>");
 		}
+		/** @var FloatTag[] $values */
 		$values = $yawPitch->getValue();
 		if(count($values) !== 2){
 			throw new \UnexpectedValueException("Expected exactly 2 entries for 'Rotation'");