codecov.yml: Update ignore list

[ferdnyc]

I realized we were trying too hard. According to the expansion returned by their validator,

ignore:
  - "examples/**/*"
  - "bindings/**/*"

translates to:

{
  "ignore": [
    "(?s:examples/.*/[^\\/]+)\\Z",
    "(?s:bindings/.*/[^\\/]+)\\Z"
]}

Which will ignore all files two levels below examples and bindings, but won't ignore any files directly inside either dir.

[codecov]

Codecov Report

Merging #587 into develop will increase coverage by 0.26%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #587      +/-   ##
===========================================
+ Coverage    52.28%   52.54%   +0.26%     
===========================================
  Files          131      129       -2     
  Lines        10761    10707      -54     
===========================================
  Hits          5626     5626              
+ Misses        5135     5081      -54     

Impacted Files	Coverage Δ
examples/ExampleHtml.cpp
examples/Example.cpp

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[ferdnyc]

There we go, that's got it. Merging.

[jonoomph]

LGTM!