remove extra spaces from Response Content-Type

[abbadon1334]

apache gives error on extra spaces for header of Content-Type

[ibelar]

Perfect!

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (develop@f42e289). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff             @@
##             develop     #792   +/-   ##
==========================================
  Coverage           ?   76.54%           
  Complexity         ?     2251           
==========================================
  Files              ?      119           
  Lines              ?     5337           
  Branches           ?        0           
==========================================
  Hits               ?     4085           
  Misses             ?     1252           
  Partials           ?        0

Impacted Files	Coverage Δ	Complexity Δ
src/App.php	82.81% <100%> (ø)	131 <0> (?)

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