Update example in readme (#413)

* update readme example

* Update README.md

Author: TheLartians

README.md

@@ -21,6 +21,30 @@ For everything else, the targets can be created manually after the dependency ha
 - [CPM: An Awesome Dependency Manager for C++ with CMake](https://medium.com/swlh/cpm-an-awesome-dependency-manager-for-c-with-cmake-3c53f4376766)
 - [CMake and the Future of C++ Package Management](https://ibob.github.io/blog/2020/01/13/cmake-package-management/)
 
+## Full CMakeLists Example
+
+```cmake
+cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
+
+# create project
+project(MyProject)
+
+# add executable
+add_executable(main main.cpp)
+
+# add dependencies
+include(cmake/CPM.cmake)
+
+CPMAddPackage("gh:fmtlib/fmt#7.1.3")
+CPMAddPackage("gh:nlohmann/json@3.10.5")
+CPMAddPackage("gh:catchorg/Catch2@2.5.0")
+
+# link dependencies
+target_link_libraries(main fmt::fmt nlohmann_json::nlohmann_json Catch2::Catch2)
+```
+
+See the [examples directory](https://github.com/cpm-cmake/CPM.cmake/tree/master/examples) for complete examples with source code and check [below](#snippets) or in the [wiki](https://github.com/cpm-cmake/CPM.cmake/wiki/More-Snippets) for example snippets.
+
 ## Usage
 
 After `CPM.cmake` has been [added](#adding-cpm) to your project, the function `CPMAddPackage` can be used to fetch and configure a dependency.
@@ -78,27 +102,6 @@ For using CPM.cmake projects with external package managers, such as conan or vc
 
 In rare cases, this behaviour may be desirable by default. The function `CPMFindPackage` will try to find a local dependency via CMake's `find_package` and fallback to `CPMAddPackage`, if the dependency is not found.
 
-## Full CMakeLists Example
-
-```cmake
-cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
-
-# create project
-project(MyProject)
-
-# add executable
-add_executable(tests tests.cpp)
-
-# add dependencies
-include(cmake/CPM.cmake)
-CPMAddPackage("gh:catchorg/Catch2@2.5.0")
-
-# link dependencies
-target_link_libraries(tests Catch2)
-```
-
-See the [examples directory](https://github.com/cpm-cmake/CPM.cmake/tree/master/examples) for complete examples with source code and check [below](#snippets) or in the [wiki](https://github.com/cpm-cmake/CPM.cmake/wiki/More-Snippets) for example snippets.
-
 ## Adding CPM
 
 To add CPM to your current project, simply add the [latest release](https://github.com/cpm-cmake/CPM.cmake/releases/latest) of `CPM.cmake` or `get_cpm.cmake` to your project's `cmake` directory.