Azure Service Bus Readme mistakes

[v-xuto]

Section Link

Suggestion:
Miss '.' at end of the word.
2.
Section Link

Suggestion:
Python 2.7, 3.5 or later
3.
Section Link

Suggestion 1:
Miss ')' end of the word 'Azure Portal'.

Suggestion 2:
Reason: Maybe we should tell users how to get a service bus connection string in Azure Portal.
Change:
(you can also find these values in the Azure portal by following the step-by-step guide to Get a service bus connection string.)
4.
Section Link

Reason:
az command lack parameter 'name', and query's value is wrong.

Suggestion:
az servicebus namespace authorization-rule keys list --resource-group $RES_GROUP --namespace-name $NAMESPACE_NAME --name RootManageSharedAccessKey --query primaryConnectionString --output tsv
5.
Section Link

Suggestion:
Modify 'corrosponding' to 'corresponding'.
6.
Section Link

Reason:
The variable queue_name is not defined.
Suggestion:
queue_name = os.environ['SERVICE_BUS_QUEUE_NAME']
7.
Section Link

Suggestion:
We should keep the headlines match to items listed in sample summary.
Update 'Send to a queue' to 'Send a message to a queue'.
Update 'Receive from a queue' to 'Receive a message from a queue'.
Update 'Defer a message' to 'Defer a message on receipt'.

[yunhaoling]

thanks @v-xuto , I have applied your suggestions in my PR and get that one merged.
#11047