[website_docs] Fix link to Go logo

[chalin]

• This is the Go docs counterpart to Mount iconography 32x32 icons to static/img/logos opentelemetry.io#2369
• Contributes to Don't link to raw.github.com images and resources, deploy them with the site opentelemetry.io#663
• Contributes to CI: check external links opentelemetry.io#1052

/cc @cartermp @svrnm

[codecov]

Codecov Report

Merging #3758 (8cdbada) into main (867900e) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #3758   +/-   ##
=====================================
  Coverage   81.6%   81.6%           
=====================================
  Files        166     166           
  Lines      12435   12435           
=====================================
  Hits       10155   10155           
  Misses      2065    2065           
  Partials     215     215           

Impacted Files	Coverage Δ
exporters/jaeger/jaeger.go	90.3% <0.0%> (-0.9%)	⬇️
sdk/trace/batch_span_processor.go	81.9% <0.0%> (+0.8%)	⬆️

[chalin]

Thanks!