updated message-borkers pages (#1219)

* updated message-borkers pages

* Update content/roadmaps/101-backend/content/117-message-brokers/100-rabbitmq.md

* Update content/roadmaps/101-backend/content/117-message-brokers/readme.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/101-backend/content/117-message-brokers/100-rabbitmq.md

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-# Rabbitmq
+# RabbitMQ
+
+With tens of thousands of users, RabbitMQ is one of the most popular open-source message brokers.  RabbitMQ is lightweight and easy to deploy on-premises and in the cloud. It supports multiple messaging protocols. RabbitMQ can be deployed in distributed and federated configurations to meet high-scale, high-availability requirements.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.rabbitmq.com/getstarted.html'>RabbitMQ Tutorials</BadgeLink>
+<BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=nFxjaVmFj5E'>RabbitMQ Tutorial - Message Queues and Distributed Systems</BadgeLink>

content/roadmaps/101-backend/content/117-message-brokers/101-kafka.md

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-# Kafka
+# Kafka
+
+Apache Kafka is an open-source distributed event streaming platform used by thousands of companies for high-performance data pipelines, streaming analytics, data integration, and mission-critical applications.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://kafka.apache.org/quickstart'>Apache Kafka quickstart</BadgeLink>
+<BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=B5j3uNBH8X4'>Apache Kafka Fundamentals</BadgeLink>

content/roadmaps/101-backend/content/117-message-brokers/readme.md

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-# Message brokers
+# Message Brokers
+
+Message brokers are an inter-application communication technology to help build a common integration mechanism to support cloud-native, microservices-based, serverless, and hybrid cloud architectures. Two of the most famous message brokers are `RabbitMQ` and `Apache Kafka`
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=57Qr9tk6Uxc'>Introduction to Message Brokers</BadgeLink>