Improve docs

Author: sbernauer

crates/stackable-operator/src/databases/drivers/celery.rs

@@ -17,7 +17,7 @@ pub trait CeleryDatabaseConnection {
     /// default [`TemplatingMechanism`].
     ///
     /// `unique_database_name` identifies this particular database connection within the operator
-    /// and is used as a prefix when naming the injected environment variable. It must consist only
+    /// and is used as a prefix when naming the injected environment variables. It must consist only
     /// of uppercase ASCII letters and underscores.
     fn celery_connection_details(
         &self,

crates/stackable-operator/src/databases/drivers/jdbc.rs

@@ -17,7 +17,7 @@ pub trait JDBCDatabaseConnection {
     /// default [`TemplatingMechanism`].
     ///
     /// `unique_database_name` identifies this particular database connection within the operator
-    /// and is used as a prefix when naming the injected environment variable. It must consist only
+    /// and is used as a prefix when naming the injected environment variables. It must consist only
     /// of uppercase ASCII letters and underscores.
     fn jdbc_connection_details(
         &self,

crates/stackable-operator/src/databases/drivers/sqlalchemy.rs

@@ -17,7 +17,7 @@ pub trait SQLAlchemyDatabaseConnection {
     /// default [`TemplatingMechanism`].
     ///
     /// `unique_database_name` identifies this particular database connection within the operator
-    /// and is used as a prefix when naming the injected environment variable. It must consist only
+    /// and is used as a prefix when naming the injected environment variables. It must consist only
     /// of uppercase ASCII letters and underscores.
     fn sqlalchemy_connection_details(
         &self,