fix(main): Typo in README.md for PubSubLiteSourceConnector (#242)

s/PubSubLiteSinkConnector/PubSubLiteSourceConnector/g where needed in README.md

Author: samarthsingal

README.md

@@ -61,7 +61,7 @@ locally in standalone mode (single process).
  - `CloudPubSubSinkConnector` and `CloudPubSubSourceConnector`
  - Create a pair of Pub/Sub [topic](https://cloud.google.com/pubsub/docs/admin#create_a_topic)
  and [subscription](https://cloud.google.com/pubsub/docs/create-subscription#pull_subscription)
- - `PubSubLiteSinkConnector` and `PubSubLiteSinkConnector`
+ - `PubSubLiteSinkConnector` and `PubSubLiteSourceConnector`
  - Create a pair of Pub/Sub Lite [topic](https://cloud.google.com/pubsub/lite/docs/topics#create_a_lite_topic)
  and [subscription](https://cloud.google.com/pubsub/lite/docs/subscriptions#create_a_lite_subscription).
 
@@ -82,7 +82,7 @@ locally in standalone mode (single process).
  1. Open [`pubsub-lite-sink-connector.properties`](/config/pubsub-lite-sink-connector.properties).
  2. Update `topics`, `pubsublite.project`, `pubsublite.location` and `pubsublite.topic`.
 
- - `PubSubLiteSinkConnector`
+ - `PubSubLiteSourceConnector`
  1. Open [`pubsub-lite-source-connector.properties`](/config/pubsub-lite-source-connector.properties).
  2. Update `kafka.topic`, `pubsublite.project`, `pubsublite.location` and `pubsublite.subscription`.
 
@@ -108,18 +108,18 @@ locally in standalone mode (single process).
  2. Follow the instructions in the [Kafka quickstart](https://kafka.apache.org/quickstart)
  to read the message from your Kafka topic.
 
- - `PubSubLiteSinkConnector`
- 1. Follow the instructions in the [Kafka quickstart](https://kafka.apache.org/quickstart)
- to publish a message to the Kafka topic.
- 2. [Pull](https://cloud.google.com/pubsub/docs/publish-receive-messages-console#pull_the_message_from_the_subscription)
- the message from your Pub/Sub Lite subscription.
-
  - `PubSubLiteSinkConnector`
  1. [Publish](https://cloud.google.com/pubsub/docs/publish-receive-messages-console#publish_a_message_to_the_topic)
  a message to your Pub/Sub Lite topic.
  2. Follow the instructions in the [Kafka quickstart](https://kafka.apache.org/quickstart)
  to read the message from your Kafka topic.
 
+ - `PubSubLiteSourceConnector`
+ 1. Follow the instructions in the [Kafka quickstart](https://kafka.apache.org/quickstart)
+ to publish a message to the Kafka topic.
+ 2. [Pull](https://cloud.google.com/pubsub/docs/publish-receive-messages-console#pull_the_message_from_the_subscription)
+ the message from your Pub/Sub Lite subscription.
+
 ### Acquire the connector
 
 The connector is available from [Maven Central repository](https://search.maven.org/artifact/com.google.cloud/pubsub-group-kafka-connector).