Update build-on-master-push.yml

Author: devinryanriota

.github/workflows/build-on-master-push.yml

@@ -3,7 +3,7 @@ name: Build project on push to master
 on: 
   push:
     branches:
-      -master
+      - master
 
 jobs:
   build:
@@ -18,4 +18,4 @@ jobs:
       - name: install dependencies
         run: yarn
       - name: build project
-        run: yarn build
+        run: yarn build