ci: fix release workflow (#375)

While trying to release v0.18.0 we got a new permissions error during
the "release workflow"
([link](https://github.com/honeycombio/terraform-provider-honeycombio/actions/runs/6487306414/job/17617320152)):

> error=scm releases: failed to publish artifacts: could not release:
POST
https://api.github.com/repos/honeycombio/terraform-provider-honeycombio/releases:
403 Resource not accessible by integration []

Looking at some similar errors, we think goreleaser may (now?) require
increased permissions to create a draft release
([reference](goreleaser/goreleaser#2642))

.github/workflows/goreleaser.yaml

@@ -9,6 +9,9 @@ jobs:
   goreleaser:
     name: Release (GoReleaser)
     runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      contents: write
 
     steps:
       - name: Checkout