meta: update pull request template

[dingsdax]

• resolves: Adjust PR template sentry-go #1083
• resolves: GO-79

[linear]

GO-79 Adjust PR template sentry-go

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.89%. Comparing base (c846e7c) to head (5583e93).
⚠️ Report is 18 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1086      +/-   ##
==========================================
+ Coverage   86.84%   86.89%   +0.04%     
==========================================
  Files          55       56       +1     
  Lines        5952     6027      +75     
==========================================
+ Hits         5169     5237      +68     
- Misses        640      645       +5     
- Partials      143      145       +2     

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