Update README.md

Author: giovastabile

README.md

@@ -22,7 +22,7 @@
 
 Linear and non-linear algebra operations which are not already implemented in OpenFOAM are performed with the external library [**Eigen**](http://eigen.tuxfamily.org/index.php?title=Main_Page). Eigen 3.4 is provided as a git submodule together with ITHACA-FV and is located in the [src/thirdyparty/Eigen](./src/thirdparty/Eigen) folder.  For the EigenValue decomposition it is also possible to rely on the [**Spectra-1.2.0**](https://spectralib.org/) library and the source code, as a git submodule, is provided in the [src/thirdyparty/spectra](./src//thirdparty/spectra) folder. Numerical optimization can be performed using the external library [**OptimLib**](https://www.kthohr.com/optimlib.html) and the header based source code, as a git submodule, is provided in the [src/thirdyparty/OptimLib](./src/thirdparty/OptimLib) folder.
 
-**ITHACA-FV** has been tested on several versions of ubuntu, CentOS 7, ArchLinux but can be easily compiled on any linux distribution with a compiled version of OpenFOAM 2106, OpenFOAM 2212, OpenFOAM 2306, OpenFOAM 2312, OpenFOAM 2406, and OpenFOAM 2412.
+**ITHACA-FV** has been tested on several versions of ubuntu, CentOS 7, ArchLinux but can be easily compiled on any linux distribution with a compiled version of OpenFOAM 2106, OpenFOAM 2212, OpenFOAM 2306, OpenFOAM 2312, OpenFOAM 2406, OpenFOAM 2412 and OpenFOAM 2506.
 
 ### 1. Prerequisites
 **ITHACA-FV** requires
@@ -32,12 +32,13 @@ Linear and non-linear algebra operations which are not already implemented in Op
 *   [**OpenFOAM 2312**](https://www.openfoam.com/news/main-news/openfoam-v2312) or
 *   [**OpenFOAM 2406**](https://www.openfoam.com/news/main-news/openfoam-v2406) or
 *   [**OpenFOAM 2412**](https://www.openfoam.com/news/main-news/openfoam-v2412) or
+*   [**OpenFOAM 2506**](https://www.openfoam.com/news/main-news/openfoam-v2506) or
 
 
 ### 2. Installation and usage
 First of all you need to source the bashrc file of your installation **OpenFOAM**. This is of course depending on the location of your OpenFOAM installation and of your particular version of OpenFOAM
 ```
-source $HOME/OpenFOAM/OpenFOAM-v2412/etc/bashrc
+source $HOME/OpenFOAM/OpenFOAM-v2506/etc/bashrc
 ```
 Then navigate to the folder where you want to install ITHACA-FV such as, for example, your HOME folder
 ```