pkg/arch: Revert back to official archlinux docker image

.github/workflows/arch.yml

@@ -12,7 +12,7 @@ jobs:
   build:
     name: Build Kernel
     runs-on: ubuntu-latest
-    container: qzed/archlinux
+    container: archlinux
     steps:
     - name: Checkout code
       uses: actions/checkout@v2

.github/workflows/arch_lts.yml

@@ -12,7 +12,7 @@ jobs:
   build:
     name: Build Kernel
     runs-on: ubuntu-latest
-    container: qzed/archlinux
+    container: archlinux
     steps:
     - name: Checkout code
       uses: actions/checkout@v2