Fix build workflow by hardcoding architectures matrix (#6665)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/builder.yml

@@ -38,6 +38,7 @@ env:
   CRANE_SHA256: "8ef3564d264e6b5ca93f7b7f5652704c4dd29d33935aff6947dd5adefd05953e"
   BUILD_NAME: supervisor
   BUILD_TYPE: supervisor
+  ARCHITECTURES: '["amd64", "aarch64"]'
 
 concurrency:
   group: "${{ github.workflow }}-${{ github.ref }}"
@@ -48,7 +49,7 @@ jobs:
     name: Initialize build
     runs-on: ubuntu-latest
     outputs:
-      architectures: ${{ steps.info.outputs.architectures }}
+      architectures: ${{ env.ARCHITECTURES }}
       version: ${{ steps.version.outputs.version }}
       channel: ${{ steps.version.outputs.channel }}
       publish: ${{ steps.version.outputs.publish }}
@@ -59,10 +60,6 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Get information
-        id: info
-        uses: home-assistant/actions/helpers/info@master
-
       - name: Get version
         id: version
         uses: home-assistant/actions/helpers/version@master