exporters/otlp/otlptrace: fix incorrect documentation

[kevinburkesegment]

No description provided.

[kevinburkesegment]

Apologies, you may want to do a re-review here, also I am having some difficulty with the make precommit target.

go: go.opentelemetry.io/otel/internal/tools imports
	github.com/golangci/golangci-lint/cmd/golangci-lint imports
	github.com/golangci/golangci-lint/pkg/commands imports
	github.com/gofrs/flock tested by
	github.com/gofrs/flock.test imports
	gopkg.in/check.v1: go.tmz.dev/musttag@v0.7.2: unrecognized import path "go.tmz.dev/musttag": parse https://go.tmz.dev/musttag?go-get=1: no go-import meta tags ()
	```

[XSAM]

Could you make this more consistent, like

Suggested change

	// WithEndpoint configures the trace host and port only; endpoint should
	// resemble "example.com" or "localhost:4317". To configure the scheme and path,
	// use WithEndpointURL.
	// WithEndpoint sets the target endpoint (host and port) the Exporter will
	// connect to. The provided endpoint should resemble "example.com:4318" (no
	// scheme or path).

[XSAM]

ditto

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.5%. Comparing base (1f76264) to head (4520c59).

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #5098   +/-   ##
=====================================
  Coverage   84.5%   84.5%           
=====================================
  Files        258     258           
  Lines      17096   17096           
=====================================
+ Hits       14452   14454    +2     
+ Misses      2345    2343    -2     
  Partials     299     299           

Files	Coverage Δ
...trace/otlptracegrpc/internal/otlpconfig/options.go	93.6% <ø> (ø)
exporters/otlp/otlptrace/otlptracegrpc/options.go	76.4% <ø> (ø)
...trace/otlptracehttp/internal/otlpconfig/options.go	92.1% <ø> (ø)
exporters/otlp/otlptrace/otlptracehttp/options.go	100.0% <ø> (ø)

... and 1 file with indirect coverage changes

[pellared]

@XSAM Are you OK if I just resolve your comments and merge the PR as it is?