Add region to LokiStack example secret and simplify creation

modules/cluster-logging-loki-deploy.adoc

@@ -44,7 +44,7 @@ You must select this option to ensure that cluster monitoring scrapes the `opens
 
 .. Ensure that *LokiOperator* is listed with *Status* as *Succeeded* in all the projects.
 +
-. Create a `Secret` YAML file that uses the `access_key_id` and `access_key_secret` fields to specify your base64-encoded AWS credentials. For example:
+. Create a `Secret` YAML file that uses the `access_key_id` and `access_key_secret` fields to specify your AWS credentials and `bucketnames`, `endpoint` and `region` to define the object storage location. For example:
 +
 [source,yaml]
 ----
@@ -53,16 +53,13 @@ kind: Secret
 metadata:
   name: logging-loki-s3
   namespace: openshift-logging
-data:
-  access_key_id: QUtJQUlPU0ZPRE5ON0VYQU1QTEUK <1>
-  access_key_secret: d0phbHJYVXRuRkVNSS9LN01ERU5HL2JQeFJmaUNZRVhBTVBMRUtFWQo= <2>
-  bucketnames: czMtYnVja2V0LW5hbWU= <3>
-  endpoint: aHR0cHM6Ly9zMy5ldS1jZW50cmFsLTEuYW1hem9uYXdzLmNvbQ== <4>
+stringData:
+  access_key_id: AKIAIOSFODNN7EXAMPLE
+  access_key_secret: wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY
+  bucketnames: s3-bucket-name
+  endpoint: https://s3.eu-central-1.amazonaws.com
+  region: eu-central-1
 ----
-<1> Base64-encoded access key id
-<2> Base64-encoded access key secret
-<3> Base64-encoded bucket name
-<4> Base64-encoded S3 API endpoint
 +
 . Create the `LokiStack` custom resource:
 +
@@ -106,11 +103,11 @@ oc apply -f logging-loki.yaml
   spec:
     managementState: Managed
     logStore:
-       type: lokistack
-       lokistack:
-         name: logging-loki
-       collection: 
-         type: "vector"
+      type: lokistack
+      lokistack:
+        name: logging-loki
+      collection:
+        type: "vector"
 ----
 +
 .. Apply the configuration: