Version updates in README.md

README.md

-# High-performance scientific computing in C++ 2022
+# High-performance scientific computing in C++ 2023
 
 Course material for the PRACE Advanced Training Course
 "High-performance scientific computing in C++",
-7 --10 June 2022, organized by the Jülich Supercomputing Centre,
+30 May -- 02 June 2023, organized by the Jülich Supercomputing Centre,
 Forschungszentrum Jülich, Germany.
 
-# hpcxx2022
+# hpcxx2023
 
 You will need to pull from this repository periodically during this course.
 
@@ -36,7 +36,7 @@ includes the PDFs of the book, course slides and other utillities.
 ## Testing your set up
 
 To work with this material, you will need to have a fairly up-to-date
-C++ compiler. GCC version 11.2 or Clang version 13.0 or later are
+C++ compiler. GCC version 13.1 or Clang version 16.0 or later are
 recommended.
 
 Microsoft's Visual C++ compiler has excellent support for C++20, if
@@ -81,7 +81,7 @@ handle C++20 modules, try the two remaining examples:
 As the above examples show, we will often need to type a
 lot of options to compile our programs during this course,
 since we want to use C++20, which is not the default
-standard for the compilers yet. A vew convenient aliases
+standard for the compilers yet. A few convenient aliases
 have been prepared which you can use to shorten the
 above compilation steps. To use them, do as follows: