added deprecation notice on release 1.5 branch source's readme (#807)

Author: gabo1208

docs/source/README.md

@@ -171,33 +171,35 @@ The source sends the following event content:
 
 ## Creating and Managing Sources
 
+*** The (Deprecated) Items in the table are going to be removed or changed in the next release ***
+
 Sources are Kubernetes objects. In addition to the standard Kubernetes
 `apiVersion`, `kind`, and `metadata`, they have the following `spec` fields:
 
 Source parameters
 | Field  | Value  |
 |--------|--------|
-| `broker` | Host+Port of the Broker, with a trailing "/" |
+| `broker` (Deprecated) | Host+Port of the Broker, with a trailing "/" |
 | `vhost` * | VHost where the source resources are located |
 | `predeclared` | Defines if the source should try to create new queue or use predeclared one (Boolean) |
-| `backoffPolicy` | The backoff policy type (linear, exponential) String |
-| `backoffDelay` | Is the delay to be used before retrying by the backoff policy (String) |
+| `backoffPolicy` (Deprecated) | The backoff policy type (linear, exponential) String |
+| `backoffDelay` (Deprecated) | Is the delay to be used before retrying by the backoff policy (String) |
 | `retry` | Number of retries to be used by the backoff policy  (Int) |
-| `user.secretKeyRef` | Username for Broker authentication; field `key` in a Kubernetes Secret named `name` |
-| `password.secretKeyRef` | Password for Broker authentication; field `key` in a Kubernetes Secret named `name` |
+| `user.secretKeyRef` (Deprecated) | Username for Broker authentication; field `key` in a Kubernetes Secret named `name` |
+| `password.secretKeyRef` (Deprecated) | Password for Broker authentication; field `key` in a Kubernetes Secret named `name` |
 | `connectionSecret` | The name of the RabbitMQ secret |
-| `exchangeConfig` | Settings for the exchange |
+| `exchangeConfig` (Deprecated) | Settings for the exchange |
 | `exchangeConfig.name` * | Name of the exchange |
 | `exchangeConfig.type` | [Exchange type](https://www.rabbitmq.com/tutorials/amqp-concepts.html#exchanges). Can be `fanout`, `direct`, `topic`, `match` or `headers` |
 | `exchangeConfig.durable` * | Boolean |
 | `exchangeConfig.autoDelete` * | Boolean |
-| `queueConfig` * | Settings for the queue |
+| `queueConfig` * (Deprecated) | Settings for the queue |
 | `queueConfig.name` | Name of the queue |
 | `queueConfig.routingKey` * | Routing key for the queue |
 | `queueConfig.durable` * | Boolean |
 | `queueConfig.autoDelete` * | Boolean |
-| `channelConfig.parallelism` * | Int that sets the [Consumer Prefetch Value](https://www.rabbitmq.com/consumer-prefetch.html) and creates `n` parallel consumer processes. Default value is `1`. Value must be between `1` and `1000`. With a value of `1` the RabbitMQ Source process events in FIFO order, values above `1` break message ordering guarantees and can be seen as more performance oriented. |
-| `channelConfig.globalQos` * | Boolean defining how the [Consumer Sharing Limit](https://www.rabbitmq.com/consumer-prefetch.html#sharing-the-limit) is handled. |
+| `channelConfig.parallelism` * (Deprecated) | Int that sets the [Consumer Prefetch Value](https://www.rabbitmq.com/consumer-prefetch.html) and creates `n` parallel consumer processes. Default value is `1`. Value must be between `1` and `1000`. With a value of `1` the RabbitMQ Source process events in FIFO order, values above `1` break message ordering guarantees and can be seen as more performance oriented. |
+| `channelConfig.globalQos` * (Deprecated) | Boolean defining how the [Consumer Sharing Limit](https://www.rabbitmq.com/consumer-prefetch.html#sharing-the-limit) is handled. |
 | `sink` | A reference to an [Addressable](https://knative.dev/docs/eventing/#event-consumers) Kubernetes object |
 | `serviceAccountName` | The service account name to be used by the Receive Adapter deployments generated by the Source |