update worker size and build parallelism (#388)

Author: Andrew Ellison

.circleci/config.yml

@@ -1,4 +1,5 @@
 defaults: &defaults
+  resource_class: medium+
   docker:
     - image: 087285199408.dkr.ecr.us-east-1.amazonaws.com/circle-ci-test-image-base:go1.17-tf1.2-tg37.4-pck1.8-ci50.1
 version: 2.1
@@ -28,7 +29,7 @@ jobs:
     <<: *defaults
     steps:
       - checkout
-      - run: build-go-binaries --parallel 3 --app-name cloud-nuke --dest-path bin --ld-flags "-X main.VERSION=$CIRCLE_TAG"
+      - run: build-go-binaries --parallel 2 --app-name cloud-nuke --dest-path bin --ld-flags "-X main.VERSION=$CIRCLE_TAG"
       - persist_to_workspace:
           root: .
           paths: bin