chore: fix psalm issues

Author: roxblnfk

psalm-baseline.xml

@@ -219,12 +219,8 @@
       <code><![CDATA[$softwareArray]]></code>
     </MixedArgument>
     <MixedAssignment>
-      <code><![CDATA[$json]]></code>
       <code><![CDATA[$softwareArray]]></code>
     </MixedAssignment>
-    <PossiblyFalseArgument>
-      <code><![CDATA[\file_get_contents(Info::ROOT_DIR . '/resources/software.json')]]></code>
-    </PossiblyFalseArgument>
   </file>
   <file src="src/Module/Repository/Collection/CompositeRepository.php">
     <InvalidArgument>

src/Module/Downloader/SoftwareCollection.php

@@ -87,8 +87,8 @@ public function count(): int
      */
     private function loadDefaultRegistry(): void
     {
-        $json = \json_decode(
-            \file_get_contents(Info::ROOT_DIR . '/resources/software.json'),
+        $json = (array) \json_decode(
+            (string) \file_get_contents(Info::ROOT_DIR . '/resources/software.json'),
             true,
             16,
             JSON_THROW_ON_ERROR,