Fix typos in bin/ docstrings and a stray character that breaks fork_counter.py

[Avicennasis]

Summary

Fixes 3 typos in bin/. Each string was verified against live master content before editing.

• bin/fork_counter.py: Y# Copyright 2011 Splunk, Inc. -> # Copyright 2011 Splunk, Inc.
• bin/splunkgit_settings.py: Functions for retriveing settigs from splunkgit conf file. -> Functions for retrieving settings from splunkgit conf file.
• bin/fetch_github_data.py: This script polls usefull github data from github -> This script polls useful github data from github

Please review carefully - the first one is a real bug, not a typo

bin/fork_counter.py currently starts with a stray Y before the copyright comment. Python parses that line as the expression statement Y followed by a comment, so the file compiles but raises NameError: name 'Y' is not defined as soon as it is imported:

$ python bin/fork_counter.py
Traceback (most recent call last):
  File "bin/fork_counter.py", line 1, in <module>
    Y# Copyright 2011 Splunk, Inc.
NameError: name 'Y' is not defined

Removing the stray character makes the module importable again. Nothing else in the repo currently references fork_counter / ForkCounter, so this change cannot regress any existing caller.

The other two changes are docstring-only.

Deliberately not changed

• Everything under lib/joblib/ - that is a vendored copy of the upstream joblib library (it ships its own test suite and module docs). 13 of the reported typos live there and belong upstream, not in this repo.
• GithubAPI._link_header_value_for_reletion - the misspelling is a method name, and renaming an identifier is out of scope for a typo PR.