ci(github): removes --if-present flag from build.yaml

Not sure what the purpose of it was. It now breaks build using parcel because parcel doesn't
understand the flag

Author: waynevanson

.github/workflows/build.yaml

@@ -37,7 +37,7 @@ jobs:
         run: yarn --frozen-lockfile
 
       - name: Build
-        run: yarn build --if-present
+        run: yarn build
         # todo - make tests
         # - run: yarn test:unit
         # - run: yarn test:compatability