Fifo: write line with \n

This is needed for eg. `read` to trigger

gitea_hooks/app.py

@@ -59,7 +59,7 @@ def fifo_hooks(payload, hook_name, hook_conf):
     """Fifo web handler -- write 1 to a unix fifo"""
     try:
         with open(hook_conf["fifo_path"], "w") as fifo:
-            fifo.write("1")
+            fifo.write("1\n")
     except FileNotFoundError:
         return "No such fifo", 500
     except PermissionError: