fix: move initialization of const above first use #2170 (#2171)

Co-authored-by: Valentin Marchaud <[email protected]>

Author: dyladan

packages/opentelemetry-tracing/src/config.ts

@@ -26,6 +26,7 @@ import {
 import { ENVIRONMENT } from '@opentelemetry/core/src/utils/environment';
 
 const env = getEnv();
+const FALLBACK_OTEL_TRACES_SAMPLER = TracesSamplerValues.AlwaysOn;
 
 /**
  * Default configuration. For fields with primitive values, any user-provided
@@ -42,8 +43,6 @@ export const DEFAULT_CONFIG = {
   },
 };
 
-const FALLBACK_OTEL_TRACES_SAMPLER = TracesSamplerValues.AlwaysOn;
-
 /**
  * Based on environment, builds a sampler, complies with specification.
  * @param env optional, by default uses getEnv(), but allows passing a value to reuse parsed environment