update README with compiler version

README

@@ -75,7 +75,7 @@ to install the BART packages, or compile it yourself as described below.
 GCC compiler, the FFTW library, and optionally CUDA.
 (see recon/Makefile to turn options on or off)
 
-The minimum GCC supported is 11. It should also be possible
+The minimum GCC supported is 12. It should also be possible
 to use the clang compiler.
 
 The software can be used in combination with Matlab or octave.
@@ -123,7 +123,8 @@ To enable gcc 8 and start a bash shell run:
 
 ### 2.1.2. Mac OS X
 
-BART is supported on Intel-based and ARM-based Macs. Xcode is also required. For ARM-based Macs, it is recommended to use gcc12 or higher.
+BART is supported on Intel-based and ARM-based Macs. Xcode is also required. For
+ARM-based Macs, it is recommended to use gcc12 or higher.
 
 Using MacPorts (http://www.macports.org/):
 
@@ -154,7 +155,9 @@ Using HomeBrew (https://brew.sh):
 
 ### 2.2.3 Windows
 
-BART is supported through WSL 2 which is avaialable on Windows 10. The instructions are similar to installing on Linux.
+BART is supported through WSL 2 which is avaialable on Windows 10. The instructions are
+similar to installing on Linux.
+
 Step-by-step instructions are available on the website at:
 	https://mrirecon.github.io/bart/installation_windows.html
 
@@ -163,12 +166,14 @@ Next follow the instructions in Section 2.2 to download and compile bart
 
 2.2.3.1. Using BART with Matlab outside of WSL
 
-To use BART outside of WSL, e.g. with Matlab, it is recommended to soft link the bart binary to /usr/local/bin. Assuming bart is installed
-in the ${BART_TOOLBOX_PATH} directory, execute the following command in WSL:
+To use BART outside of WSL, e.g. with Matlab, it is recommended to soft link
+the bart binary to /usr/local/bin. Assuming bart is installed in
+the ${BART_TOOLBOX_PATH} directory, execute the following command in WSL:
 
     $ sudo ln -s ${BART_TOOLBOX_PATH}/bart /usr/local/bin/bart
 
-Outside of WSL, copy the files from ${BART_TOOLBOX_PATH}/matlab to a local folder and add the folder to the Matlab path.
+Outside of WSL, copy the files from ${BART_TOOLBOX_PATH}/matlab to a local folder
+and add the folder to the Matlab path.