Update ArrayFire version used for ci builds to 3.7.2

Author: 9prady9

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
         name: Build and Test Wrapper
         runs-on: ubuntu-18.04
         env:
-            AF_VER: 3.7.0
+            AF_VER: 3.7.2
         steps:
             - name: Checkout Repository
               uses: actions/checkout@master