Merge pull request #61 from elbeno/update-versions

📚 Update README for compiler versions

Author: bdeane-intel

README.md

@@ -15,7 +15,7 @@ concurrent execution.
 C++20 is required to use the `conc` namespace functionality; C++17 will suffice
 for the `atomic` namespace functionality. The following compilers are supported:
 
-- clang 14 through 19
-- gcc 12 through 13
+- clang 14 through 21
+- gcc 12 through 14
 
 See the [full documentation](https://intel.github.io/cpp-baremetal-concurrency/).