build: switch to ghcr.io for docker container

Signed-off-by: deadprogram <[email protected]>

Author: deadprogram

.github/workflows/build.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    container: tinygo/tinygo-dev
+    container: ghcr.io/tinygo-org/tinygo-dev
     steps:
       - name: Work around CVE-2022-24765
         # We're not on a multi-user machine, so this is safe.