[OBSDOCS-2681] Update documentation for logging-loki-minio secret

Line continuation character () is missing from the Minio Storage Secret command
Here is the documentation link:
https://docs.redhat.com/en/documentation/red_hat_openshift_logging/6.3/html/configuring_logging/configuring-lokistack-storage#logging-loki-storage-minio_configuring-the-log-store 
The backslash () must be set at the end of a line, as it is a line continuation character.
Here is the current look:

Create an object storage secret with the name logging-loki-minio by running the following command:
$ oc create secret generic logging-loki-minio \  1 
  --from-literal=bucketnames="<bucket_name>" \
  --from-literal=endpoint="<minio_bucket_endpoint>" \
  --from-literal=access_key_id="<minio_access_key_id>" \
  --from-literal=access_key_secret="<minio_access_key_secret>"
  --from-literal=forcepathstyle="true"
The backslash ()  is missing from line no. 5
As backslash is a line continuation character,  so we need to add it to the command.
So it will complete the command.
Here is the updated look:

Create an object storage secret with the name logging-loki-minio by running the following command:
$ oc create secret generic logging-loki-minio \  1 
  --from-literal=bucketnames="<bucket_name>" \
  --from-literal=endpoint="<minio_bucket_endpoint>" \
  --from-literal=access_key_id="<minio_access_key_id>" \
  --from-literal=access_key_secret="<minio_access_key_secret>" \
  --from-literal=forcepathstyle="true"

Author: prithvipatil97

modules/logging-loki-storage-minio.adoc

@@ -25,7 +25,7 @@ $ oc create secret generic logging-loki-minio \ # <1>
   --from-literal=bucketnames="<bucket_name>" \
   --from-literal=endpoint="<minio_bucket_endpoint>" \
   --from-literal=access_key_id="<minio_access_key_id>" \
-  --from-literal=access_key_secret="<minio_access_key_secret>"
+  --from-literal=access_key_secret="<minio_access_key_secret>" \
   --from-literal=forcepathstyle="true" # <2>
 ----
 <1> `logging-loki-minio` is the name of the secret.