Update mimedb to set the correct content-types

[harshavardhana]

No description provided.

[codecov]

Codecov Report

Merging #2587 into master will decrease coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2587      +/-   ##
==========================================
- Coverage    10.1%   10.05%   -0.05%     
==========================================
  Files         121      121              
  Lines       11246    11246              
==========================================
- Hits         1136     1131       -5     
- Misses       9960     9964       +4     
- Partials      150      151       +1

Impacted Files	Coverage Δ
cmd/pipechan.go	87.8% <0%> (-12.2%)	⬇️

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[kannappanr]

LGTM