fix: SSA Delimiter Docs

[pnadolny13]

I ran into this today. The docs say that leaving this blank defaults to a comma but thats not true based on the code https://github.com/ets/tap-spreadsheets-anywhere/blob/0b8b905a025e394dc937324c32860c6c4b5a01d8/tap_spreadsheets_anywhere/csv_handler.py#L31

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[github-actions]

Testing plugin tap-spreadsheets-anywhere (ets variant):

Starting test job...
...
Job completed.

Usage info

melty-bot % tap-spreadsheets-anywhere --help
usage: tap-spreadsheets-anywhere [-h] -c CONFIG [-s STATE] [-p PROPERTIES]
                                 [--catalog CATALOG] [-d] [--dev]

options:
  -h, --help            show this help message and exit
  -c CONFIG, --config CONFIG
                        Config file
  -s STATE, --state STATE
                        State file
  -p PROPERTIES, --properties PROPERTIES
                        Property selections: DEPRECATED, Please use --catalog
                        instead
  --catalog CATALOG     Catalog file
  -d, --discover        Do schema discovery
  --dev                 Runs tap in dev mode

Detected capabilities

• ✅ 'discover'
• ✅ 'catalog'
• ✅ 'state'
• ❌ 'about'