Fix architecture name

Author: agners

.github/workflows/build.yaml

@@ -82,10 +82,10 @@ jobs:
     strategy:
       matrix:
         arch:
-          - name: linux-x86_64
+          - name: x86_64
             container: ghcr.io/project-chip/chip-build:1
             runner: ubuntu-22.04
-          - name: linux-aarch64
+          - name: aarch64
             container: docker.io/agners/aarch64-chip-build:1
             runner: ARM64