Point to the flutter salt master server. (#2461)

Bug:https://github.com/flutter/flutter/issues/120211
diff --git a/dev/provision_salt.sh b/dev/provision_salt.sh
index cc4a31e..11fb533 100755
--- a/dev/provision_salt.sh
+++ b/dev/provision_salt.sh
@@ -75,9 +75,10 @@
 
 function main() {
   local master_hostname=''
+  # TODO(yusuf-goog): Update the hostname below when we get a dev flutter salt master.
   case "$1" in
-    prod) master_hostname='salt.endpoints.fuchsia-infra.cloud.goog' ;;
-    dev) master_hostname='salt.endpoints.fuchsia-infra-dev.cloud.goog' ;;
+    prod) master_hostname='salt-flutter.endpoints.fuchsia-infra.cloud.goog' ;;
+    dev) master_hostname='salt-flutter.endpoints.fuchsia-infra.cloud.goog' ;;
     *)
       Usage
       exit 1