fixup! fix: replace deprecated and removed OC\Server getters

Signed-off-by: Christoph Wurst <1374172+ChristophWurst@users.noreply.github.com>

Author: ChristophWurst

tests/psalm-baseline.xml

@@ -493,6 +493,13 @@
       <code><![CDATA[$value]]></code>
     </PossiblyUndefinedArrayOffset>
   </file>
+  <file src="lib/Service/HtmlPurify/TransformURLScheme.php">
+    <NullArgument>
+      <code><![CDATA[null]]></code>
+      <code><![CDATA[null]]></code>
+      <code><![CDATA[null]]></code>
+    </NullArgument>
+  </file>
   <file src="lib/Service/IMipService.php">
     <PossiblyNullArgument>
       <code><![CDATA[$sender]]></code>