Update contrib.go.opencensus.io/exporter/ocagent digest to 7399e0f

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
contrib.go.opencensus.io/exporter/ocagent	indirect	digest	05415f1 → 7399e0f

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.45%. Comparing base (b47170d) to head (e25adf5).

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2405      +/-   ##
============================================
+ Coverage     43.76%   46.45%   +2.69%     
============================================
  Files           275       34     -241     
  Lines         13243     4107    -9136     
  Branches       1328        0    -1328     
============================================
- Hits           5796     1908    -3888     
+ Misses         6857     2000    -4857     
+ Partials        590      199     -391     

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