fix(html): support tg-spoiler tag too

[tdakkota]

No description provided.

[codecov]

Codecov Report

Merging #655 (a34ebc2) into main (2a2238c) will increase coverage by 0.16%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #655      +/-   ##
==========================================
+ Coverage   68.78%   68.94%   +0.16%     
==========================================
  Files         425      425              
  Lines       20346    20350       +4     
==========================================
+ Hits        13994    14030      +36     
+ Misses       5451     5416      -35     
- Partials      901      904       +3     

Impacted Files	Coverage Δ
telegram/message/html/parser.go	84.15% <100.00%> (+0.35%)	⬆️
internal/mtproto/conn.go	92.22% <0.00%> (-3.34%)	⬇️
telegram/updates/state_apply.go	21.87% <0.00%> (-3.13%)	⬇️
telegram/updates/sequence_box.go	81.41% <0.00%> (+0.88%)	⬆️
telegram/updates/state.go	51.28% <0.00%> (+2.56%)	⬆️
telegram/updates/state_channel.go	48.58% <0.00%> (+2.83%)	⬆️
telegram/updates/internal/e2e/server.go	71.53% <0.00%> (+6.15%)	⬆️
telegram/updates/gap_buffer.go	82.14% <0.00%> (+10.71%)	⬆️
telegram/updates/update.go	71.42% <0.00%> (+61.90%)	⬆️

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