CI: Allow more permissive HTTP retries/timeouts when connecting to conda
Hoping this alleviates the following traceback that has been occurring recently

```
     Traceback (most recent call last):
        File "/usr/share/miniconda/lib/python3.9/site-packages/urllib3/response.py", line 438, in _error_catcher
          yield
        File "/usr/share/miniconda/lib/python3.9/site-packages/urllib3/response.py", line 767, in read_chunked
          chunk = self._handle_chunk(amt)
        File "/usr/share/miniconda/lib/python3.9/site-packages/urllib3/response.py", line 711, in _handle_chunk
          value = self._fp._safe_read(amt)
        File "/usr/share/miniconda/lib/python3.9/http/client.py", line 626, in _safe_read
          chunk = self.fp.read(min(amt, MAXAMOUNT))
        File "/usr/share/miniconda/lib/python3.9/socket.py", line 704, in readinto
          return self._sock.recv_into(b)
        File "/usr/share/miniconda/lib/python3.9/ssl.py", line 1241, in recv_into
          return self.read(nbytes, buffer)
        File "/usr/share/miniconda/lib/python3.9/ssl.py", line 1099, in read
          return self._sslobj.read(len, buffer)
      ConnectionResetError: [Errno 104] Connection reset by peer
  
      During handling of the above exception, another exception occurred:
  
      Traceback (most recent call last):
        File "/usr/share/miniconda/lib/python3.9/site-packages/requests/models.py", line 760, in generate
          for chunk in self.raw.stream(chunk_size, decode_content=True):
        File "/usr/share/miniconda/lib/python3.9/site-packages/urllib3/response.py", line 572, in stream
          for line in self.read_chunked(amt, decode_content=decode_content):
        File "/usr/share/miniconda/lib/python3.9/site-packages/urllib3/response.py", line 793, in read_chunked
          self._original_response.close()
        File "/usr/share/miniconda/lib/python3.9/contextlib.py", line 137, in __exit__
          self.gen.throw(typ, value, traceback)
        File "/usr/share/miniconda/lib/python3.9/site-packages/urllib3/response.py", line 455, in _error_catcher
          raise ProtocolError("Connection broken: %r" % e, e)
      urllib3.exceptions.ProtocolError: ("Connection broken: ConnectionResetError(104, 'Connection reset by peer')", ConnectionResetError(104, 'Connection reset by peer'))
```

Failure will be fixed by https://github.com/pandas-dev/pandas/pull/47259