qapi/run-state.json: Fix missing newline at end of file

The run-state.json file is missing a trailing newline; add it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230417164041.684562-10-peter.maydell@linaro.org

qapi/run-state.json

@@ -666,4 +666,4 @@
 # Since: 7.2
 ##
 { 'enum': 'NotifyVmexitOption',
-  'data': [ 'run', 'internal-error', 'disable' ] }
+  'data': [ 'run', 'internal-error', 'disable' ] }