docs: tiny typo

Author: henryiii

README.rst

@@ -128,7 +128,7 @@ Supported compilers
 2. GCC 4.8 or newer
 3. Microsoft Visual Studio 2015 Update 3 or newer
 4. Intel C++ compiler 18 or newer
-   (`possible issue <https://github.com/pybind/pybind11/pull/2573>`_) on 20.2)
+   (`possible issue <https://github.com/pybind/pybind11/pull/2573>`_ on 20.2)
 5. Cygwin/GCC (tested on 2.5.1)
 6. NVCC (CUDA 11.0 tested)
 7. NVIDIA PGI (20.7 and 20.9 tested)