[Monitor-Opentelemetry] fix documentation (Azure#27286)

### Packages impacted by this PR

@azure/monitor-opentelemetry

### Issues associated with this PR


### Describe the problem that is addressed by this PR

Documentation is wrong, and the property name used throws an error.

### What are the possible designs available to address the problem? If
there are more than one possible design, why was the one in this PR
chosen?

N/A

### Are there test cases added in this PR? _(If not, why?)_

N/A

### Provide a list of related PRs _(if any)_

N/A

### Command used to generate this PR:**_(Applicable only to SDK release
request PRs)_

### Checklists
- [x] Added impacted package name to the issue description
- [x] Added a changelog (if necessary)

sdk/monitor/monitor-opentelemetry/README.md

@@ -30,7 +30,7 @@ See our [support policy](https://github.com/Azure/azure-sdk-for-js/blob/main/SUP
 const { useAzureMonitor, AzureMonitorOpenTelemetryOptions } = require("@azure/monitor-opentelemetry");
 
 const options: AzureMonitorOpenTelemetryOptions = {
-  azureMonitorExporterConfig: {
+  azureMonitorExporterOptions: {
     connectionString:
       process.env["APPLICATIONINSIGHTS_CONNECTION_STRING"] || "<your connection string>",
   },
@@ -49,7 +49,7 @@ const { Resource } = require("@opentelemetry/resources");
 
 const resource = new Resource({ "testAttribute": "testValue" });
 const options: AzureMonitorOpenTelemetryOptions = {
-    azureMonitorExporterConfig: {
+    azureMonitorExporterOptions: {
         // Offline storage
         storageDirectory: "c://azureMonitor",
         // Automatic retries
@@ -89,7 +89,7 @@ useAzureMonitor(options);
 
 |Property|Description|Default|
 | ------------------------------- |------------------------------------------------------------------------------------------------------------|-------|
-| azureMonitorExporterConfig                     | Azure Monitor OpenTelemetry Exporter Configuration. [More info here](https://github.com/Azure/azure-sdk-for-js/tree/main/sdk/monitor/monitor-opentelemetry-exporter)                                                | |
+| azureMonitorExporterOptions                     | Azure Monitor OpenTelemetry Exporter Configuration. [More info here](https://github.com/Azure/azure-sdk-for-js/tree/main/sdk/monitor/monitor-opentelemetry-exporter)                                                | |
 | otlpTraceExporterConfig                     | OTLP Trace Exporter Configuration. [More info here](https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/packages/exporter-trace-otlp-http) 
 | otlpMetricExporterConfig                     | OTLP Trace Exporter Configuration. [More info here](https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/packages/opentelemetry-exporter-metrics-otlp-http) 
 | otlpLogExporterConfig                     | OTLP Trace Exporter Configuration. [More info here](https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/packages/exporter-logs-otlp-http)                                         | |