Fix function the test found

Author: marcleblanc2

charts/sourcegraph/templates/_helpers.tpl

@@ -175,7 +175,7 @@ app.kubernetes.io/name: jaeger
     fieldRef:
       fieldPath: status.hostIP
 - name: OTEL_EXPORTER_OTLP_ENDPOINT
-  value: http://$(OTEL_AGENT_HOST):{{ toYaml .Values.openTelemetry.agent.hostPorts.otlpGrpc }}
+  value: http://$(OTEL_AGENT_HOST):{{ toYaml .Values.openTelemetry.agent.hostPorts.grpcOtlp }}
 {{- end }}
 {{- end }}