Add @esigo as approver

[lalitb]

@esigo has been actively contributing to OpenTelemetry C++ across many modules as well as general improvements to the CI and infrastructure. He has also expressed the willingness to make more contributions in the future.

Few of the recent PRs @esigo has authored ( Total - 40 closed, 2 open)

• Continuous benchmark tests as part of the CI open-telemetry/opentelemetry-cpp#1174
• importing gsl::span if std::span is not available open-telemetry/opentelemetry-cpp#1167
• Synchronized calls to Exporter::Export & Shutdown open-telemetry/opentelemetry-cpp#1164
• Jaeger: ThriftSender unit test open-telemetry/opentelemetry-cpp#1162
• InMemorySpanExporter shutdown open-telemetry/opentelemetry-cpp#1161
• ZipkinExporter unit-tests open-telemetry/opentelemetry-cpp#1155
• ZipkinExporter shutdown open-telemetry/opentelemetry-cpp#1153
• Add unit-test for Jaeger exporter open-telemetry/opentelemetry-cpp#1151
• Jaeger exporter shutdown open-telemetry/opentelemetry-cpp#1150
• Logger-Support-for-Instrumentation-library open-telemetry/opentelemetry-cpp#1149
• etw logger test bazel open-telemetry/opentelemetry-cpp#1148
• C++20 not Building with VS2019 open-telemetry/opentelemetry-cpp#1144
• Otlp http cmake build fail open-telemetry/opentelemetry-cpp#1133
• Logger: Support for Instrumentation library open-telemetry/opentelemetry-cpp#1128
• run_docker user open-telemetry/opentelemetry-cpp#1123

PRs @esigo has contributed as a reviewer:

• Add Aggregation as part of metrics SDK. open-telemetry/opentelemetry-cpp#1178
• Fix build test of Zipkin exporter on Windows open-telemetry/opentelemetry-cpp#1177
• Use custom abseil with bazel open-telemetry/opentelemetry-cpp#1172
• Waiting a longer time when run unit tests of http client, which may take a long time when run under valgrind. open-telemetry/opentelemetry-cpp#1171
• Fix leak in Jaeger exporter open-telemetry/opentelemetry-cpp#1160
• Rename OTEL_CPP_GET_ATTR macro, and define it using fully qualified attr function. open-telemetry/opentelemetry-cpp#1140
• Add note on DLL support  open-telemetry/opentelemetry-cpp#1137

[codecov-commenter]

Codecov Report

Merging #80 (802e12c) into main (1f0bf83) will decrease coverage by 0.01%.
The diff coverage is 95.66%.

@@            Coverage Diff             @@
##             main      #80      +/-   ##
==========================================
- Coverage   93.29%   93.29%   -0.00%     
==========================================
  Files         174      174              
  Lines        6391     6404      +13     
==========================================
+ Hits         5962     5974      +12     
- Misses        429      430       +1     

Impacted Files	Coverage Δ
api/include/opentelemetry/common/spin_lock_mutex.h	31.25% <ø> (ø)
...lemetry/nostd/internal/absl/base/internal/invoke.h	100.00% <ø> (ø)
...try/nostd/internal/absl/types/bad_variant_access.h	100.00% <ø> (ø)
...metry/nostd/internal/absl/types/internal/variant.h	70.26% <ø> (ø)
.../opentelemetry/nostd/internal/absl/types/variant.h	100.00% <ø> (ø)
...pentelemetry/nostd/internal/absl/utility/utility.h	100.00% <ø> (ø)
api/include/opentelemetry/nostd/variant.h	66.67% <ø> (ø)
...de/opentelemetry/exporters/ostream/span_exporter.h	100.00% <ø> (ø)
...lemetry/ext/http/client/curl/http_operation_curl.h	78.09% <ø> (ø)
...nclude/opentelemetry/sdk/common/empty_attributes.h	100.00% <ø> (ø)
... and 6 more