tiny change of local variable usage

Author: YuriyHolinko

exporters/sender/jdk/src/main/java/io/opentelemetry/exporter/sender/jdk/internal/JdkHttpSender.java

@@ -262,7 +262,7 @@ HttpResponse<byte[]> sendInternal(Marshaler marshaler) throws IOException {
               exception);
         }
         if (!retryable) {
-          throw e;
+          throw exception;
         }
       }
     } while (++attempt < retryPolicy.getMaxAttempts());