(DOCSP-43999) Fixing substitutions/source constants

Author: lmkerbey-mdb

snooty.toml

@@ -16,6 +16,7 @@ toc_landing_pages = [
 ]
 
 [constants]
+atlas-sp = "Atlas Stream Processing"
 connector = "MongoDB Kafka Connector"
 connector-short = "Kafka Connector"
 connector-long = "MongoDB Connector for Apache Kafka"
@@ -62,3 +63,4 @@ jmx-port-mapping = "35000"
 sandbox-directory = "kafka-edu/docs-examples/mongodb-kafka-base/"
 win-sandbox-directory = "kafka-edu\\docs-examples\\mongodb-kafka-base\\"
 cluster = "MongoDB cluster"
+clusters = "MongoDB clusters"

source/kafka-connector-atlas-stream-processing-comparison.txt

@@ -66,7 +66,7 @@ best suits your use case.
    * - Security Features
      - - SSL/TLS
        - X.509
-       - {+aws+} |iam|
+       - {+aws+} IAM
        - User must develop all other authentication tools
      - - SSL/TLS
        - X.509