Ignore arm64 dir

Padraig Gleeson · Padraig Gleeson · commit 8e31eb88cb04 · 2023-04-12T12:22:49.000+01:00
diff --git a/.gitignore b/.gitignore
@@ -39,3 +39,4 @@ Tutorial/Source/*json
 /Tutorial/Source/HHCellNetwork.net.nml__flattened.xml
 /notebooks/Python_HH_version/hh_py_v.dat
 /Tutorial/Source/HHCellSingleAP.net.nml__flattened.xml
+arm64
