Fix the failing test case for the Result Type

builder

@@ -72,7 +72,7 @@ function memcheck() {
 }
 
 function run-tests() {
-    $BUILD_DIR/tests/tests
+    $BUILD_DIR/src/tests/tests
 }
 
 function tests() {

include/serene/utils.h

@@ -80,7 +80,7 @@ public:
 
   /// Return the a boolean value indicating whether the value is succesful
   /// or errorful.
-  bool ok() const { return std::holds_alternative<1>(contents); };
+  bool ok() const { return std::holds_alternative<T>(contents); };
 
   operator bool() const { return ok(); }
 };