Improve docstring (@lexming)

Co-authored-by: Alex Domingo <alex.domingo.toro@vub.be>

Author: bartoldeman

easybuild/toolchains/nvhpc.py

@@ -56,7 +56,7 @@ def __new__(cls, *args, **kwargs):
 
 
 class NVHPCToolchain(NvidiaCompilersToolchain):
-    """DEPRECATED alias for NvidiaCompilersToolchain."""
+    """DEPRECATED legacy compiler-only toolchain for NVHPC."""
     DEPRECATED = True
     NAME = 'NVHPC'
     COMPILER_MODULE_NAME = ['NVHPC']