Update stack-ghc-9.6.2.yaml

- Update Docker repo with multi-arch alternative

Author: benz0li

stack-ghc-9.6.2.yaml

@@ -13,7 +13,7 @@ drop-packages:
 
 docker:
   enable: false
-  repo: fpco/alpine-haskell-stack:8.10.4
+  repo: glcr.b-data.ch/ghc/ghc-musl:9.6.2
 
 nix:
   # --nix on the command-line to enable.