Added a full stop at the end of the README file (#118)

* WIP: Added ‘subscription-key’ header to Apigee requests to Azure APIM

* Trying incorrect subscription-key

* Following the ‘subscription-key’ pattern done by the ‘service-search’ API

* Updated the mapIdentifier

* Added a full stop at the end of the README file

Author: adrianparr

README.md

@@ -171,4 +171,4 @@ This file defines 2 dictionaries of fields that are required for the Apigee depl
 
 This template uses poetry for python dependency management, and uses these files: poetry.lock, poetry.toml, pyproject.toml.
 
-Node dependencies of this template project and some npm scripts are listed in: package.json, package-lock.json.
+Node dependencies of this template project and some npm scripts are listed in: package.json, package-lock.json..

proxies/live/apiproxy/policies/KeyValueMapOperations.GetSubscriptionKey.xml

@@ -1,4 +1,4 @@
-<KeyValueMapOperations name="KeyValueMapOperations.GetSubscriptionKey" mapIdentifier="service-search">
+<KeyValueMapOperations name="KeyValueMapOperations.GetSubscriptionKey" mapIdentifier="nhs-website-content-api">
    <Get assignTo="private.subscriptionKey" index='1'>
       <Key>
          <Parameter>subscription-key</Parameter>

proxies/live/apiproxy/targets/target.xml

@@ -7,6 +7,12 @@
       <Step>
         <Name>FlowCallout.ApplyRateLimiting</Name>
       </Step>
+      <Step>
+        <Name>KeyValueMapOperations.GetSubscriptionKey</Name>
+      </Step>
+      <Step>
+        <Name>AssignMessage.AddSubscriptionKey</Name>
+      </Step>
     </Request>
     <Response>
       <Step>