Change README to show the requirement on C++20

Signed-off-by: Ted Lyngmo <[email protected]>

Author: TedLyngmo

README.md

@@ -41,17 +41,14 @@ Full runnable examples can be found in [`examples/`](examples/).
 
 This project requires at least the following to build:
 
-* A C++ compiler that conforms to the C++17 standard or greater
+* A C++ compiler that conforms to the C++20 standard or greater
 * CMake 3.25 or later
 * (Test Only) GoogleTest
 
 You can disable building tests by setting CMake option
 [`BEMAN_TIMED_LOCK_ALG_BUILD_TESTS`](#beman_timed_lock_alg_build_tests) to `OFF`
 when configuring the project.
 
-Even when tests are being built and run, some of them will not be compiled
-unless the provided compiler supports **C++20** ranges.
-
 > [!TIP]
 >
 > The logs indicate examples disabled due to lack of compiler support.