[docs] Correct language idenitifiers in IO quickstart documentation (a…

…pache#6145)

### Motivation

When I read the documentation about connectors I saw that some code blocks are not highlighted, because of incorrect language identifiers.

### Modifications

Correct language identifiers were applied.

site2/docs/io-quickstart.md

@@ -52,7 +52,7 @@ For more information about **how to install a standalone Pulsar and built-in con
     ```
 
     **Example output**
-    ```shell
+    ```json
     [{"workerId":"c-standalone-fw-localhost-6750","workerHostname":"localhost","port":6750}]
     ```
 
@@ -62,8 +62,8 @@ For more information about **how to install a standalone Pulsar and built-in con
     curl -s http://localhost:8080/admin/v2/namespaces/public
     ```
 
-    **Example outoupt**
-    ```shell
+    **Example output**
+    ```json
     ["public/default","public/functions"]
     ```
 
@@ -184,7 +184,7 @@ You can create a configuration file through one of the following methods.
 
 * YAML
 
-    ```
+    ```yaml
     configs:
         roots: "localhost:9042"
         keyspace: "pulsar_test_keyspace"
@@ -233,7 +233,7 @@ to monitor a connector and perform other operations on it.
 
   **Example output**
 
-  ```bash
+  ```json
   {
     "tenant": "public",
     "namespace": "default",
@@ -270,7 +270,7 @@ to monitor a connector and perform other operations on it.
 
   **Example output**
 
-  ```shell
+  ```json
   {
     "numInstances" : 1,
     "numRunning" : 1,
@@ -314,7 +314,7 @@ to monitor a connector and perform other operations on it.
 
     **Example output**
 
-    ```shell
+    ```json
     {
       "numInstances" : 1,
       "numRunning" : 1,
@@ -482,7 +482,7 @@ In this section, you need to configure a JDBC sink connector.
 
     Create a _pulsar-mysql-jdbc-sink.yaml_ file, copy the following contents to this file, and place the file in the `pulsar/connectors` folder.
 
-    ```bash
+    ```yaml
     configs:
       userName: "root"
       password: "jdbc"
@@ -494,7 +494,7 @@ In this section, you need to configure a JDBC sink connector.
 
     Create a _avro-schema_ file, copy the following contents to this file, and place the file in the `pulsar/connectors` folder.
 
-    ```bash
+    ```json
     {
       "type": "AVRO",
       "schema": "{\"type\":\"record\",\"name\":\"Test\",\"fields\":[{\"name\":\"id\",\"type\":[\"null\",\"int\"]},{\"name\":\"name\",\"type\":[\"null\",\"string\"]}]}",
@@ -523,7 +523,7 @@ In this section, you need to configure a JDBC sink connector.
 
     The schema has been uploaded successfully if the following message appears.
 
-    ```bash
+    ```json
     {"name":"pulsar-mysql-jdbc-sink-topic","schema":"{\"type\":\"record\",\"name\":\"Test\",\"fields\":[{\"name\":\"id\",\"type\":[\"null\",\"int\"]},{\"name\":\"name\",\"type\":[\"null\",\"string\"]}]}","type":"AVRO","properties":{}}
     ```
 
@@ -586,7 +586,7 @@ to monitor a connector and perform other operations on it.
 
   The result shows that only the _mysql-jdbc-sink_ sink is running.
 
-  ```bash
+  ```json
   [
   "pulsar-mysql-jdbc-sink"
   ]
@@ -607,7 +607,7 @@ to monitor a connector and perform other operations on it.
 
   The result shows the information of the sink connector, including tenant, namespace, topic and so on.
 
-  ```bash
+  ```json
   {
     "tenant": "public",
     "namespace": "default",
@@ -646,7 +646,7 @@ to monitor a connector and perform other operations on it.
 
   The result shows the current status of sink connector, including the number of instance, running status, worker ID and so on.
 
-  ```bash
+  ```json
   {
     "numInstances" : 1,
     "numRunning" : 1,
@@ -757,7 +757,7 @@ $ bin/pulsar-admin sinks get \
 
 The result shows that the parallelism is 2.
 
-```text
+```json
 {
   "tenant": "public",
   "namespace": "default",
@@ -788,7 +788,7 @@ to delete a connector and perform other operations on it.
 
 This example deletes the _pulsar-mysql-jdbc-sink_ sink connector.
 
-```text
+```bash
 $ bin/pulsar-admin sinks delete \
 --tenant public \
 --namespace default \
@@ -807,7 +807,7 @@ The sink connector has been deleted successfully if the following message appear
 
 This example double-checks the status of the sink connector.
 
-```text
+```bash
 $ bin/pulsar-admin sinks get \
 --tenant public \
 --namespace default \