[doc] Fix Kaleidoscope tutorial chapter 3 code snippet and full listing discrepancies (#111289)

Fix two discrepancies between the cited snippets and the full code.

Author: aidint

llvm/docs/tutorial/MyFirstLanguageFrontend/LangImpl03.rst

@@ -74,7 +74,7 @@ parser, which will be used to report errors found during code generation
 .. code-block:: c++
 
     static std::unique_ptr<LLVMContext> TheContext;
-    static std::unique_ptr<IRBuilder<>> Builder(TheContext);
+    static std::unique_ptr<IRBuilder<>> Builder;
     static std::unique_ptr<Module> TheModule;
     static std::map<std::string, Value *> NamedValues;
 
@@ -171,7 +171,7 @@ variables <LangImpl07.html#user-defined-local-variables>`_.
       case '<':
         L = Builder->CreateFCmpULT(L, R, "cmptmp");
         // Convert bool 0/1 to double 0.0 or 1.0
-        return Builder->CreateUIToFP(L, Type::getDoubleTy(TheContext),
+        return Builder->CreateUIToFP(L, Type::getDoubleTy(*TheContext),
                                      "booltmp");
       default:
         return LogErrorV("invalid binary operator");