document deprecation of graph names with unesacped dots in USE clauses (#1145)

Co-authored-by: Jens Pryce-Åklundh <[email protected]>

Author: nadja-muller

modules/ROOT/pages/deprecations-additions-removals-compatibility.adoc

@@ -150,6 +150,18 @@ CREATE DATABASE db OPTIONS { storeFormat: 'high_limit' }
 | The `standard` and `high_limit` store formats have been deprecated.
 Creating databases with these formats is therefore also deprecated.
 For more information on the deprecation of these formats, see link:{neo4j-docs-base-uri}/operations-manual/{page-version}/database-internals/store-formats/#format-deprecations[Store formats -> Format deprecations].
+
+a|
+label:functionality[]
+label:deprecated[]
+[source, cypher, role="noheader"]
+----
+USE my.db ...
+
+----
+| In xref:clauses/use.adoc[`USE`] clauses, databases and aliases with unquoted `.` are deprecated unless the `.` is used to indicate that the database or alias belongs to a composite database.
+Names containing `.` should be quoted using backticks. 
+For example, `USE `my.db`` is valid.
 |===