Revert to using matrix for release workflow (#4294)

Setting max parallel number of jobs to 1. The `yarn changeset publish` command deletes files in the .changesets folder, so it's not safe to run two changeset steps in the same job.

.github/workflows/release.yml

@@ -7,7 +7,14 @@ on:
 
 jobs:
   release:
+    name: ${{ matrix.channel }}
     runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 1
+      matrix:
+        channel:
+          - latest
+          - dev
 
     steps:
       - name: Checkout repo
@@ -29,6 +36,7 @@ jobs:
 
       # https://github.com/changesets/action
       - name: Create release pull request or Publish to npm
+        if: matrix.channel == 'latest'
         uses: changesets/action@master
         with:
           publish: yarn changeset publish
@@ -39,6 +47,7 @@ jobs:
 
       # https://github.com/atlassian/changesets/blob/master/docs/snapshot-releases.md
       - name: Release to @dev channel
+        if: matrix.channel == 'dev'
         run: |
           yarn changeset version --snapshot
           yarn changeset publish --tag dev