Fix alert message markdown

[holycheater]

first word is eaten away by markdown because it expects language for highlighting

[codecov[bot]]

Codecov Report

Merging #34 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #34   +/-   ##
=======================================
  Coverage   98.33%   98.33%           
=======================================
  Files           1        1           
  Lines          60       60           
  Branches        4        4           
=======================================
  Hits           59       59           
  Partials        1        1

Impacted Files	Coverage Δ
sentry_telegram/plugin.py	98.33% <ø> (ø)	:arrow_up:

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[butorov]

Thank you, @holycheater! You are right, the default value for the Message Template had this mistake.

The project was abandoned for some time, so your change goes to the upcoming new release.