Update build.yml

Author: torresc24

.github/workflows/build.yml

@@ -1,11 +1,9 @@
 name: Build and Deploy
-
 on:
   push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-
+    # Sequence of patterns matched against refs/tags
+    tags:
+      - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
 jobs:
   build:
     runs-on: Ubuntu-18.04