fix: typo in the changelog.

Fix typo in the changelog.

Signed-off-by: José Guilherme Vanz <[email protected]>

Author: jvanz

opentelemetry-otlp/CHANGELOG.md

@@ -10,7 +10,7 @@
   "reqwest-blocking-client" features as default, to align with the
   specification.
   [2516](https://github.com/open-telemetry/opentelemetry-rust/pull/2516)
-- TLS configuration via environment variables for GRPc exporters.
+- TLS configuration via environment variables for GRPC exporters.
 
 ## 0.27.0