Update matlabact.yml

Author: mw-jsgeorge

.github/workflows/matlabact.yml

@@ -15,7 +15,8 @@ jobs:
         os: [ubuntu-latest]    
         release: [latest-including-prerelease]
 
-    runs-on: ${{ matrix.os }}
+    #runs-on: ${{ matrix.os }}
+    runs-on: self-hosted
 
     steps:
       - name: Check out repository