better handle API response

[ChrisCarini]

Traceback (most recent call last):
  File "main.py", line 34, in <module>
    main()
  File "main.py", line 24, in main
    update_gist(
  File "/home/runner/work/shodan-exposure-box/shodan-exposure-box/shodan.py", line 84, in update_gist
    gist.edit(
  File "/opt/hostedtoolcache/Python/3.8.17/x64/lib/python3.8/site-packages/github/Gist.py", line 258, in edit
    headers, data = self._requester.requestJsonAndCheck(
  File "/opt/hostedtoolcache/Python/3.8.17/x64/lib/python3.8/site-packages/github/Requester.py", line 443, in requestJsonAndCheck
    *self.requestJson(
  File "/opt/hostedtoolcache/Python/3.8.17/x64/lib/python3.8/site-packages/github/Requester.py", line 580, in requestJson
    return self.__requestEncode(cnx, verb, url, parameters, headers, input, encode)
  File "/opt/hostedtoolcache/Python/3.8.17/x64/lib/python3.8/site-packages/github/Requester.py", line 694, in __requestEncode
    int(responseHeaders[Consts.headerRateRemaining]),
ValueError: invalid literal for int() with base 10: '99.0'