One more 8.5 fix

Author: danog

src/Psalm/Type/Atomic/TLiteralFloat.php

@@ -33,6 +33,9 @@ public function getId(bool $exact = true, bool $nested = false): string
         if (!$exact) {
             return 'float';
         }
+        if (is_nan($this->value)) {
+            return 'float(NAN)';
+        }
 
         return 'float(' . $this->value . ')';
     }