Update .gitignore

[songy23]

Ignore VS Code files.

[codecov-io]

Codecov Report

Merging #1463 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master   #1463      +/-   ##
===========================================
+ Coverage     82.38%   82.4%   +0.01%     
  Complexity     1541    1541              
===========================================
  Files           235     235              
  Lines          7228    7228              
  Branches        688     688              
===========================================
+ Hits           5955    5956       +1     
  Misses         1060    1060              
+ Partials        213     212       -1

Impacted Files	Coverage Δ	Complexity Δ
...census/implcore/trace/export/SpanExporterImpl.java	93.15% <0%> (+1.36%)	8% <0%> (ø)	⬇️

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