Replace occurance of 'sslspecial' with 'sslSpecial' in v3.2 evergreen.yml

Currently, running 'evergreen patch' results in the following error message:

Unexpected reply from server (400 Bad Request): Invalid patch: invalid patched config: error loading project yaml: error evaluating 'sslspecial' selector: no task named 'sslspecial'

One occurrence of the 'sslSpecial' suite appears to have been misspelled as 'sslspecial' and should be fixed.