Small fix for documentation on using SSL in Connection (#995)

The sample code shows asyncio.run(run()), but the function to be run is named "main()". So this sample does not run.

Author: ScottFred

asyncpg/connection.py

@@ -2041,7 +2041,7 @@ async def connect(dsn=None, *,
  ... )
  ... con = await asyncpg.connect(user='postgres', ssl=sslctx)
  ... await con.close()
- >>> asyncio.run(run())
+ >>> asyncio.run(main())
 
  Example of programmatic SSL context configuration that is equivalent
  to ``sslmode=require`` (no server certificate or host verification):
@@ -2058,7 +2058,7 @@ async def connect(dsn=None, *,
  ... sslctx.verify_mode = ssl.CERT_NONE
  ... con = await asyncpg.connect(user='postgres', ssl=sslctx)
  ... await con.close()
- >>> asyncio.run(run())
+ >>> asyncio.run(main())
 
  :param bool direct_tls:
  Pass ``True`` to skip PostgreSQL STARTTLS mode and perform a direct