ci: auto assign project to issues/prs

Signed-off-by: Carlos Alexandro Becker <caarlos0@gmail.com>

.github/workflows/assign.yml

@@ -0,0 +1,18 @@
+name: Auto-assign project
+
+on:
+  issues:
+    types: [opened]
+  pull_request:
+    types: [opened]
+env:
+  MY_GITHUB_TOKEN: ${{ secrets.GH_PAT }}
+
+jobs:
+  assign:
+    runs-on: ubuntu-latest
+    name: Assign Project and Milestone
+    steps:
+    - uses: srggrs/assign-one-project-github-action@1.2.1
+      with:
+        project: 'https://github.com/orgs/goreleaser/projects/3'