Update 100-installing.md (#4143)

Previously the MinGW-64 link redirected to an error 404 page 
Fixed it to redirect to the overview page

src/data/roadmaps/cpp/content/101-setting-up/100-installing.md

@@ -4,7 +4,7 @@ Before you can start programming in C++, you will need to have a compiler instal
 ### Windows
 For Windows, one popular option is to install the [Microsoft Visual Studio IDE](https://visualstudio.microsoft.com/vs/), which includes the Microsoft Visual C++ compiler.
 
-Alternatively, you can also install the [MinGW-w64](https://mingw-w64.org/doku.php) compiler, which is a Windows port of the GNU Compiler Collection (GCC). To install MinGW-w64, follow these steps:
+Alternatively, you can also install the [MinGW-w64](https://mingw-w64.org/) compiler, which is a Windows port of the GNU Compiler Collection (GCC). To install MinGW-w64, follow these steps:
 
 - Download the installer from [here](https://sourceforge.net/projects/mingw-w64/files/).
 - Run the installer and select your desired architecture, version, and install location.
@@ -46,4 +46,4 @@ g++ --version
 
 You should see output displaying the version of your installed C++ compiler.
 
-Now you're ready to start writing and compiling your C++ code!
+Now you're ready to start writing and compiling your C++ code!