Automatically create a release PR in homebrew-tap repo (#841)

## Changes
Automatically create a release PR in homebrew-tap repo

## Tests
Ran ` act -j create-homebrew-tap-release-pr -s DECO_GITHUB_TOKEN="$(gh
auth token)"`

Result: https://github.com/databricks/homebrew-tap/pull/29

.github/workflows/release.yml

@@ -30,7 +30,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-  create-release-prs:
+  create-setup-cli-release-pr:
     needs: goreleaser
     runs-on: ubuntu-latest
     steps:
@@ -53,3 +53,40 @@ jobs:
                 version: "${{ env.VERSION }}",
               }
             });
+
+  create-homebrew-tap-release-pr:
+    needs: goreleaser
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set VERSION variable from tag
+        run: |
+          VERSION=${{ github.ref_name }}
+          echo "VERSION=${VERSION:1}" >> $GITHUB_ENV
+
+      - name: Update homebrew-tap
+        uses: actions/github-script@v6
+        with:
+          github-token: ${{ secrets.DECO_GITHUB_TOKEN }}
+          script: |
+            let artifacts = JSON.parse('${{ needs.goreleaser.outputs.artifacts }}')
+            artifacts = artifacts.filter(a => a.type == "Archive")
+            artifacts = new Map(
+              artifacts.map(a => [
+                a.goos + "_" + a.goarch,
+                a.extra.Checksum.replace("sha256:", "")
+              ])
+            )
+
+            await github.rest.actions.createWorkflowDispatch({
+              owner: 'databricks',
+              repo: 'homebrew-tap',
+              workflow_id: 'release-pr.yml',
+              ref: 'main',
+              inputs: {
+                version: "${{ env.VERSION }}",
+                darwin_amd64_sha: artifacts.get('darwin_amd64'),
+                darwin_arm64_sha: artifacts.get('darwin_arm64'),
+                linux_amd64_sha: artifacts.get('linux_amd64'),
+                linux_arm64_sha: artifacts.get('linux_arm64')
+              }
+            });