Update SECURITY.md

[colin-gourlay]

Corrected typo

Description:

Related issue (if applicable): #

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• No lint errors (use flake8)
• 100% test coverage

Testing

Anyone can help test this source code as follows:

# Create a virtual environment to work in as follows:
python3 -m venv apprise

# Change into our new directory
cd apprise

# Activate our virtual environment
source bin/activate

# Install the branch
pip install git+https://github.com/caronc/apprise.git@<this.branch-name>

# Test out the changes with the following command:
apprise -t "Test Title" -b "Test Message" \
  <apprise url related to ticket>

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f1d697f) 99.51% compared to head (6793a82) 99.51%.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1002   +/-   ##
=======================================
  Coverage   99.51%   99.51%           
=======================================
  Files         125      125           
  Lines       16760    16760           
  Branches     3434     3434           
=======================================
  Hits        16679    16679           
  Misses         70       70           
  Partials       11       11           

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[caronc]

Thank you for this 🙂