Switch Dockerfile to point to our own fork

This includes a change that changes how the groups method of syncing
names groups (to include the domain from the group's email address).

Dockerfile

@@ -1,11 +1,13 @@
 FROM public.ecr.aws/lambda/go:1
 
 WORKDIR ${LAMBDA_TASK_ROOT}
-ARG SSOSYNC_VERSION=v2.0.2
+ARG SSOSYNC_VERSION=v2.0.3-fac
+ARG GITHUB_REPO_OWNER=fac
+
 
 # Download SSOSync binary
 RUN mkdir -p downloads && \
-    curl -Lo downloads/ssosync_Linux_x86_64.tar.gz https://github.com/awslabs/ssosync/releases/download/${SSOSYNC_VERSION}/ssosync_Linux_x86_64.tar.gz && \
+    curl -Lo downloads/ssosync_Linux_x86_64.tar.gz https://github.com/${GITHUB_REPO_OWNER}/ssosync/releases/download/${SSOSYNC_VERSION}/ssosync_Linux_x86_64.tar.gz && \
     tar xzvf downloads/ssosync_Linux_x86_64.tar.gz -C downloads/ && \
     mv downloads/ssosync ${LAMBDA_TASK_ROOT}/ && \
     rm -rf downloads