Try a string with newlines?

Github actions don't support yaml lists?

Author: natebosch

.github/workflows/publish.yaml

@@ -13,10 +13,10 @@ jobs:
     if: ${{ github.repository_owner == 'dart-lang' }}
     uses: dart-lang/ecosystem/.github/workflows/publish.yaml@main
     with:
-      ignore-packages:
-      - pkgs/cupertino_http/
-      - pkgs/cronet_http/
-      - pkgs/ok_http/
+      ignore-packages: |
+        pkgs/cupertino_http/
+        pkgs/cronet_http/
+        pkgs/ok_http/
     permissions:
       id-token: write # Required for authentication using OIDC
       pull-requests: write # Required for writing the pull request note

.github/workflows/publish_flutter.yaml

@@ -14,10 +14,10 @@ jobs:
     uses: dart-lang/ecosystem/.github/workflows/publish.yaml@main
     with:
       use-flutter: true
-      ignore-packages:
-      - pkgs/http/
-      - pkgs/http_profile/
-      - pkgs/web_socket/
+      ignore-packages: |
+        pkgs/http/
+        pkgs/http_profile/
+        pkgs/web_socket/
     permissions:
       id-token: write # Required for authentication using OIDC
       pull-requests: write # Required for writing the pull request note