fix: fix image name (#84)

Author: t-aleksander

.github/workflows/build-docker.yml

@@ -9,7 +9,7 @@ on:
         type: string
 
 env:
-  GHCR_REPO: ghcr.io/defguard/proxy
+  GHCR_REPO: ghcr.io/defguard/defguard-proxy
 
 jobs:
   build-docker: