fix tests

Tests/InstantSearchCoreTests/Unit/DecodingErrorPrettyPrinterTests.swift

@@ -34,7 +34,7 @@ class DecodingErrorPrettyPrinterTests: XCTestCase {
         return
       }
       let prettyPrinter = DecodingErrorPrettyPrinter(decodingError: decodingError)
-      XCTAssertEqual(prettyPrinter.description, "Decoding error: 'age': Expected Int value but found null instead.")
+      XCTAssertEqual(prettyPrinter.description, "Decoding error: 'age': Cannot get unkeyed decoding container -- found null value instead")
     }
   }