Docs: Correct references to 'lockingMigration' (#51678)

Signed-off-by: Dave Henderson <dave.henderson@grafana.com>

conf/defaults.ini

@@ -125,7 +125,7 @@ path = grafana.db
 # For "sqlite3" only. cache mode setting used for connecting to the database
 cache_mode = private
 
-# For "mysql" only if lockingMigration feature toggle is set. How many seconds to wait before failing to lock the database for the migrations, default is 0.
+# For "mysql" only if migrationLocking feature toggle is set. How many seconds to wait before failing to lock the database for the migrations, default is 0.
 locking_attempt_timeout_sec = 0
 
 #################################### Cache server #############################

conf/sample.ini

@@ -126,7 +126,7 @@
 # For "sqlite3" only. cache mode setting used for connecting to the database. (private, shared)
 ;cache_mode = private
 
-# For "mysql" only if lockingMigration feature toggle is set. How many seconds to wait before failing to lock the database for the migrations, default is 0.
+# For "mysql" only if migrationLocking feature toggle is set. How many seconds to wait before failing to lock the database for the migrations, default is 0.
 ;locking_attempt_timeout_sec = 0
 
 ################################### Data sources #########################

docs/sources/setup-grafana/configure-grafana/_index.md

@@ -324,7 +324,7 @@ Sets the maximum amount of time a connection may be reused. The default is 14400
 
 ### locking_attempt_timeout_sec
 
-For "mysql", if `lockingMigration` feature toggle is set, specify the time (in seconds) to wait before failing to lock the database for the migrations. Default is 0.
+For "mysql", if the `migrationLocking` feature toggle is set, specify the time (in seconds) to wait before failing to lock the database for the migrations. Default is 0.
 
 ### log_queries