sagemathgh-36947: `sage -package download`: Fix argparse for `--no-check-certificate`
    
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A mistake in sagemath#36774 broke the macOS CI in 10.3.beta3, see
https://github.com/sagemath/sage/actions/runs/7255417440/job/19765989346
#step:9:1425
```
  [patch-2.7.5] error installing, exit status 1. End of log file:
  [patch-2.7.5]   usage: sage --package [-h] [--log LOG] [--no-check-
certificate]
  [patch-2.7.5]
{config,list,name,tarball,apropos,update,update-
latest,download,upload,fix-checksum,create,clean}
  [patch-2.7.5]                         ...
  [patch-2.7.5]   sage --package: error: unrecognized arguments: --no-
check-certificate
  [patch-2.7.5]
************************************************************************
  [patch-2.7.5]   Error downloading tarball of patch
  [patch-2.7.5]
************************************************************************
```

We make the one-line fix for this here.

Tests (with other merged branches) at
https://github.com/mkoeppe/sage/actions/runs/7295997767/job/19883171237

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URL: sagemath#36947
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee

Author: Release Manager

build/sage_bootstrap/cmdline.py

@@ -292,7 +292,7 @@ def make_parser():
     parser_download.add_argument(
         '--on-error', choices=['stop', 'warn'], default='stop',
         help='What to do if the tarball cannot be downloaded')
-    parser.add_argument(
+    parser_download.add_argument(
         '--no-check-certificate', action='store_true',
         help='Do not check SSL certificates for https connections')