Bump go.opentelemetry.io/collector/confmap in /exporter/signalfxexporter

Bumps [go.opentelemetry.io/collector/confmap](https://github.com/open-telemetry/opentelemetry-collector) from 0.81.0 to 0.86.0.
- [Release notes](https://github.com/open-telemetry/opentelemetry-collector/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-collector/blob/main/CHANGELOG-API.md)
- [Commits](open-telemetry/opentelemetry-collector@v0.81.0...v0.86.0)

---
updated-dependencies:
- dependency-name: go.opentelemetry.io/collector/confmap
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

exporter/signalfxexporter/go.mod

@@ -20,7 +20,7 @@ require (
 	go.opentelemetry.io/collector/config/confighttp v0.81.0
 	go.opentelemetry.io/collector/config/configopaque v0.81.0
 	go.opentelemetry.io/collector/config/configtls v0.81.0
-	go.opentelemetry.io/collector/confmap v0.81.0
+	go.opentelemetry.io/collector/confmap v0.86.0
 	go.opentelemetry.io/collector/consumer v0.81.0
 	go.opentelemetry.io/collector/exporter v0.81.0
 	go.opentelemetry.io/collector/pdata v1.0.0-rcv0013
@@ -77,7 +77,7 @@ require (
 	go.opentelemetry.io/collector/config/internal v0.81.0 // indirect
 	go.opentelemetry.io/collector/extension v0.81.0 // indirect
 	go.opentelemetry.io/collector/extension/auth v0.81.0 // indirect
-	go.opentelemetry.io/collector/featuregate v1.0.0-rcv0013 // indirect
+	go.opentelemetry.io/collector/featuregate v1.0.0-rcv0015 // indirect
 	go.opentelemetry.io/collector/processor v0.81.0 // indirect
 	go.opentelemetry.io/collector/receiver v0.81.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.42.0 // indirect