chore: use config.yml to indicate releaser

We want to cleanup our GitHub tokens, and this repo is different from all others by historical accident.
diff --git a/.bcr/config.yml b/.bcr/config.yml
new file mode 100644
index 0000000..bd3fa11
--- /dev/null
+++ b/.bcr/config.yml
@@ -0,0 +1,4 @@
+# See https://github.com/bazel-contrib/publish-to-bcr#a-note-on-release-automation
+fixedReleaser:
+  login: kormide
+  email: derek@aspect.dev
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index e32cfb8..f561976 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -50,5 +50,4 @@
             /tmp/aspect/release/*
             bazel-lib-*.tar.gz
           body_path: release_notes.txt
-          token: ${{ secrets.DEREK_BCR_PAT }}
           fail_on_unmatched_files: true