update test expectation swift 5.8.1 -> 5.9

Author: tayloraswift

Sources/UnidocQueryTests/SymbolQueries.swift

@@ -48,7 +48,7 @@ struct SymbolQueries:UnidocDatabaseTestBattery
                 against: packages,
                 with: session) ==?
             .init(id: .init(package: .swift,
-                    version: "5.8.1",
+                    version: "5.9.0",
                     triple: toolchain.triple),
                 edition: .init(package: 0, version: 0),
                 type: .insert))