docs: add logging.InjectFields usage description

[aimuz]

Fixed #521

[johanbrandhorst]

I'm confused by this change. Did we remove the tags interceptor? If so, we should just remove it from the list, not keep it strikethrough.

[aimuz]

The implementation of tags has been removed in v2.

[johanbrandhorst]

Thanks for the clarification, lets just remove this.

[johanbrandhorst]

Lets just remove this line

[codecov-commenter]

Codecov Report

Patch coverage: 61.52% and project coverage change: -25.27 ⚠️

Comparison is base (6e2c2ac) 84.01% compared to head (0ee4ff1) 58.74%.

❗ Current head 0ee4ff1 differs from pull request most recent head 33531ba. Consider uploading reports for the commit 33531ba to get more accurate results

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Additional details and impacted files

@@             Coverage Diff             @@
##               v2     #541       +/-   ##
===========================================
- Coverage   84.01%   58.74%   -25.27%     
===========================================
  Files          30       31        +1     
  Lines         932     1583      +651     
===========================================
+ Hits          783      930      +147     
- Misses        110      590      +480     
- Partials       39       63       +24     

Impacted Files	Coverage Δ
chain.go	0.00% <ø> (-90.91%)	⬇️
interceptors/auth/auth.go	100.00% <ø> (ø)
interceptors/ratelimit/ratelimit.go	60.00% <0.00%> (-40.00%)	⬇️
interceptors/recovery/options.go	78.57% <ø> (ø)
metadata/single_key.go	60.00% <ø> (ø)
testing/testpb/interceptor_suite.go	0.00% <0.00%> (ø)
testing/testpb/test.manual_validator.pb.go	0.00% <0.00%> (ø)
testing/testpb/test.pb.go	35.17% <ø> (ø)
testing/testpb/test_grpc.pb.go	52.21% <ø> (ø)
util/backoffutils/backoff.go	60.00% <ø> (ø)
... and 21 more

... and 3 files with indirect coverage changes

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[johanbrandhorst]

Thanks for your contribution!