MPI library clarification and WRF-Hydro version numbering fix

src/README.build.md

@@ -9,7 +9,7 @@ https://ral.ucar.edu/projects/wrf_hydro
   - Cray (ftn)
   - Intel (ifort)
   - NVidia (nvfortran)
-* MPI libraries (MPICH or Open MPI)
+* MPI library (MPICH, Open MPI, etc.)
 * NetCDF C & Fortran libraries v4.0+
 
 Please note that these libraries need to be compiled with the same set of
@@ -26,16 +26,16 @@ Download and unpack the source code and navigate to the directory where you
 will compile the code:
 
 ```
-$ wget https://github.com/NCAR/wrf_hydro_nwm_public/archive/refs/tags/v5.4.0.tar.gz
-$ tar zxf v5.4.0.tar.gz
+$ wget https://github.com/NCAR/wrf_hydro_nwm_public/archive/refs/tags/v5.3.0.tar.gz
+$ tar zxf v5.3.0.tar.gz
 $ cd wrf_hydro_nwm_public-5.3.0/src
 ```
 
 2. Compile using CMake
 
-Create build directory, configure with CMake, and then compile. 
+Create build directory, configure with CMake, and then compile.
 See the [CMake Build link](https://github.com/NCAR/wrf_hydro_nwm_public/blob/main/docs/BUILD.md#cmake-build)
-for a table of WRF-Hydro specific configuration options. 
+for a table of WRF-Hydro specific configuration options.
 The user can enable debug mode, nudging, etc.
 
 ```
@@ -49,7 +49,6 @@ This should result in the creation of a 'Run' directory populated with the
 appropriate template parameter tables and namelists for the land surface model
 selected as well as a model executable that is then symlinked to wrf_hydro.exe.
 
-Note that, as mentioned above, passing the environment variable file as an 
+Note that, as mentioned above, passing the environment variable file as an
 argument to the compile script is optional. However, if this is not passed the
 desired environment variables must be set prior to running the compile script.
-