Removed HTML escaping for Telegram TEXT handling

[caronc]

Description:

Related issue (if applicable): #373
Escaping the HTML characters before passing the content along to Telegram causes the upstream service to re-escape them again.

This small merge request just drops the escaping of these characters since it is no longer required.

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

[codecov-commenter]

Codecov Report

Merging #383 (98f3886) into master (975b172) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #383   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           93        93           
  Lines        11767     11765    -2     
  Branches      1960      1960           
=========================================
- Hits         11767     11765    -2     

Impacted Files	Coverage Δ
apprise/plugins/NotifyTelegram.py	100.00% <ø> (ø)

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