chore: updated issue template

[fmartingr]

Updated issue template with references to default database engine plus the new shiori version command.

Note: Merge this the moment we release 1.6.0.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 25.58%. Comparing base (595cb45) to head (824b2fa).
Report is 3 commits behind head on master.

❗ Current head 824b2fa differs from pull request most recent head 596d1aa. Consider uploading reports for the commit 596d1aa to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #672   +/-   ##
=======================================
  Coverage   25.58%   25.58%           
=======================================
  Files          47       47           
  Lines        5628     5628           
=======================================
  Hits         1440     1440           
  Misses       3989     3989           
  Partials      199      199           

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