Update jetty

[robdaemon]

Update jetty version due to https://nvd.nist.gov/vuln/detail/CVE-2019-17638

[codecov]

Codecov Report

Merging #13510 into release-0.36.x will decrease coverage by 0.01%.
The diff coverage is n/a.

@@                Coverage Diff                 @@
##           release-0.36.x   #13510      +/-   ##
==================================================
- Coverage           82.76%   82.75%   -0.02%     
==================================================
  Files                 325      325              
  Lines               25510    25510              
  Branches             1853     1855       +2     
==================================================
- Hits                21114    21110       -4     
- Misses               2543     2545       +2     
- Partials             1853     1855       +2     

Impacted Files	Coverage Δ
src/metabase/plugins/dependencies.clj	86.27% <0.00%> (-5.89%)	⬇️
src/metabase/plugins/initialize.clj	48.14% <0.00%> (-3.71%)	⬇️

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