update the publishing script (dart-archive/io#96)

Author: devoncarew

pkgs/io/.github/workflows/publish.yaml

@@ -11,4 +11,4 @@ on:
 jobs:
   publish:
     if: ${{ github.repository_owner == 'dart-lang' }}
-    uses: devoncarew/firehose/.github/workflows/publish.yaml@main
+    uses: dart-lang/ecosystem/.github/workflows/publish.yaml@main

pkgs/io/README.md

@@ -100,5 +100,5 @@ void main() {
 
 ## Publishing automation
 
-For information about our publishing automation and process, see
+For information about our publishing automation and release process, see
 https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.