Fix --new-display bash completion

The option --new-display accepts an optional argument, but bash must not
try to auto-complete it with unrelated content.

app/data/bash-completion/scrcpy

@@ -194,6 +194,7 @@ _scrcpy() {
         |--display-id \
         |--max-fps \
         |-m|--max-size \
+        |--new-display \
         |-p|--port \
         |--push-target \
         |--rotation \