examples: Fix wrong indentation in discover-loop.py

Running `examples/discover-loop.py` fails:

```
  File "examples/discover-loop.py", line 59
    c.disconnect()
    ^
IndentationError: expected an indented block after 'try' statement on line 58
```

Signed-off-by: Benjamin Drung <[email protected]>

Author: bdrung

examples/discover-loop.py

@@ -56,7 +56,7 @@ def disc_supp_str(dlp_supp_opts):
     sys.exit(f'Failed to discover: {e}')
 
 try:
-c.disconnect()
+    c.disconnect()
 except Exception as e:
     sys.exit(f'Failed to disconnect: {e}')