chore: fix typos and minor README

[mayurkale22]

No description provided.

[codecov-io]

Codecov Report

Merging #759 into master will decrease coverage by 2.78%.
The diff coverage is 95.2%.

@@            Coverage Diff             @@
##           master     #759      +/-   ##
==========================================
- Coverage   90.45%   87.66%   -2.79%     
==========================================
  Files         233      149      -84     
  Lines       11501     5685    -5816     
  Branches     1011      503     -508     
==========================================
- Hits        10403     4984    -5419     
+ Misses       1098      701     -397

Impacted Files	Coverage Δ
packages/opentelemetry-tracing/test/Span.test.ts	100% <ø> (ø)	⬆️
...ackages/opentelemetry-web/src/WebTracerProvider.ts	100% <ø> (ø)	⬆️
...-metrics/test/export/ConsoleMetricExporter.test.ts	100% <ø> (ø)	⬆️
packages/opentelemetry-web/test/WebTracer.test.ts	0% <0%> (ø)	⬆️
...metry-core/src/trace/instrumentation/BasePlugin.ts	86.84% <100%> (-5.62%)	⬇️
...y-api/test/noop-implementations/noop-meter.test.ts	97.22% <100%> (ø)	⬆️
...ry-tracing/test/export/SimpleSpanProcessor.test.ts	100% <100%> (ø)	⬆️
...s/opentelemetry-tracing/src/BasicTracerProvider.ts	100% <100%> (ø)	⬆️
...ckages/opentelemetry-plugin-grpc/test/grpc.test.ts	96.2% <100%> (ø)	⬆️
...s/opentelemetry-metrics/test/MeterProvider.test.ts	100% <100%> (ø)	⬆️
... and 161 more