OT Shim: Use 'opentracing-shim' as instrumentation scope name.

[carlosalberto]

This matches the expected name from the related Spec section.

[codecov]

Codecov Report

Base: 90.83% // Head: 90.83% // No change to project coverage 👍

Coverage data is based on head (4165e3e) compared to base (21d5597).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #4890   +/-   ##
=========================================
  Coverage     90.83%   90.83%           
  Complexity     4857     4857           
=========================================
  Files           556      556           
  Lines         14475    14475           
  Branches       1410     1410           
=========================================
  Hits          13149    13149           
  Misses          908      908           
  Partials        418      418           

Impacted Files	Coverage Δ
...opentelemetry/opentracingshim/OpenTracingShim.java	100.00% <100.00%> (ø)

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