Upgrade OTel dependencies to v0.40.0. (#778)

* Upgrade OTel dependencies to v0.40.0.

* Bumped the version number in the versions.yaml.

* Fix README links.

Author: jefchien

README.md

@@ -5,7 +5,7 @@
 
 ### Overview
 
-AWS Distro for OpenTelemetry Collector(AWS OTel Collector) is a AWS supported version of the upstream OpenTelemetry Collector and is distributed by Amazon. It supports the selected components from the OpenTelemetry community. It is fully compatible with AWS computing platforms including EC2, ECS and EKS. It enables users to send telemetry data to AWS CloudWatch Metrics, Traces and Logs backends as well as the other supported backends.
+AWS Distro for OpenTelemetry Collector (AWS OTel Collector) is an AWS supported version of the upstream OpenTelemetry Collector and is distributed by Amazon. It supports the selected components from the OpenTelemetry community. It is fully compatible with AWS computing platforms including EC2, ECS and EKS. It enables users to send telemetry data to AWS CloudWatch Metrics, Traces and Logs backends as well as the other supported backends.
 
 See the [AWS Distro for OpenTelemetry documentation](https://aws-otel.github.io/docs/getting-started/collector) for more information.
 
@@ -20,7 +20,7 @@ Use the community resources below for getting help with AWS OTel Collector.
 
 #### AWS OTel Collector Built-in Components
 
-This table represents the supported components of AWS OTel Collector in 2020. The highlighted components below are developed by AWS in-house. The rest of the components in the table are the essential default components that AWS OTel Collector will support.
+This table represents the supported components of AWS OTel Collector. The highlighted components below are developed by AWS in-house. The rest of the components in the table are the essential default components that AWS OTel Collector will support.
 
 | Receiver                        | Processor                     | Exporter                           | Extensions             |
 |---------------------------------|-------------------------------|------------------------------------|------------------------|
@@ -42,9 +42,9 @@ This table represents the supported components of AWS OTel Collector in 2020. Th
 #### AWS OTel Collector AWS Components
 
 * [OpenTelemetry Collector](https://github.com/open-telemetry/opentelemetry-collector/)
-* [Trace X-Ray Exporter](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/master/exporter/awsxrayexporter)
-* [Metrics EMF Exporter](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/master/exporter/awsemfexporter/README.md)
-* [ECS Container Metrics Receiver](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/master/receiver/awsecscontainermetricsreceiver)
+* [Trace X-Ray Exporter](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/exporter/awsxrayexporter)
+* [Metrics EMF Exporter](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/exporter/awsemfexporter)
+* [ECS Container Metrics Receiver](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/awsecscontainermetricsreceiver)
 * [StatsD Receiver](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/statsdreceiver)
 * [ECS Observer Extension](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/extension/observer/ecsobserver)
 
@@ -57,9 +57,9 @@ To build AWS OTel Collector locally, you will need to have Golang installed. You
 #### AWS OTel Collector Configuration
 
 We built in a [default configuration](https://github.com/aws-observability/aws-otel-collector/blob/main/config.yaml) to our docker image and other format of release.
-So you can run AWS OTel Collector out of box with the default settings.
+So, you can run the AWS OTel Collector out of the box with the default settings.
 Also, AWS OTel Collector configuration uses the same configuration syntax/design from [OpenTelemetry Collector](https://github.com/open-telemetry/opentelemetry-collector)
-so you can customize or porting your OpenTelemetry Collector configuration files when running AWS OTel Collector. please refer `Try out AWS OTel Collector` section on configuring AWS OTel Collector.
+so you can customize or port your OpenTelemetry Collector configuration files when running AWS OTel Collector. Please refer to the `Try out AWS OTel Collector` section on configuring AWS OTel Collector.
 
 #### Try out AWS OTel Collector
 
@@ -74,7 +74,7 @@ AWS OTel Collector supports all AWS computing platforms and docker/kubernetes. H
 
 #### Build Your Own Artifacts
 
-Use the following instruction to build your own AWS OTel Collector artifacts:
+Use the following instructions to build your own AWS OTel Collector artifacts:
 
 * [Build Docker Image](https://github.com/aws-observability/aws-otel-collector/blob/main/docs/developers/build-docker.md)
 * [Build RPM/Deb/MSI](https://github.com/aws-observability/aws-otel-collector/blob/main/docs/developers/build-aoc.md)
@@ -90,7 +90,7 @@ See [docs/developers](docs/developers/README.md)
 ### Benchmark
 
 The latest performance model result is [here](https://github.com/aws-observability/aws-otel-collector/blob/main/docs/performance_model.md). 
-The performance test conducted by following the [instruction](https://github.com/aws-observability/aws-otel-test-framework/blob/terraform/docs/get-performance-model.md) here.
+The performance test can be conducted by following the [instructions](https://github.com/aws-observability/aws-otel-test-framework/blob/terraform/docs/get-performance-model.md) here.
 
 ### License