Prometheus: Data source settings page help wording. (#28274)

* Add a space between: "handled." and "Server".

This text is .. a little ambiguous, is it:
  "handled.Server()..."

or:
  "handled. Server should...."

Punctuation it matters.
  https://i.pinimg.com/originals/ad/db/a1/addba11374256fd0b1d679a595f57d9b.jpg

* Fix the sentence to be readable.

packages/grafana-ui/src/components/DataSourceSettings/DataSourceHttpSettings.tsx

@@ -37,9 +37,9 @@ const HttpAccessHelp = () => (
     <p>
       Access mode controls how requests to the data source will be handled.
       <strong>
-        <i>Server</i>
+        &nbsp<i>Server</i>
       </strong>{' '}
-      should be the preferred way if nothing else stated.
+      should be the preferred way if nothing else is stated.
     </p>
     <div className="alert-title">Server access mode (Default):</div>
     <p>