fix(sdk/log): correct changelog reference issue ID to PR ID

Author: hostejulien

CHANGELOG.md

@@ -54,7 +54,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Add experimental self-observability trace exporter metrics in `go.opentelemetry.io/otel/exporters/stdout/stdouttrace`.
   Check the `go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x` package documentation for more information. (#7133)
 - Add experimental self-observability metrics for the simple log processor in `go.opentelemetry.io/otel/sdk/log`.
-  Adds `otel.sdk.processor.log.processed` metric when `OTEL_GO_X_SELF_OBSERVABILITY` environment variable is set to `true`. (#7016)
+  Adds `otel.sdk.processor.log.processed` metric when `OTEL_GO_X_SELF_OBSERVABILITY` environment variable is set to `true`. (#7127)
 
 ### Changed