Docs build failure

There's a build issue caused by this: https://github.com/debezium/debezium/blob/main/documentation/modules/ROOT/pages/install.adoc#consuming-snapshot-releases

There's a reference to "master", this needs adjustment in that file in all branches 1.1 - 1.9.

Also there's a reference to "master" in the MongoDB connector page which needs fixing: https://github.com/debezium/debezium/blob/main/documentation/modules/ROOT/pages/connectors/mongodb.adoc#deployment