fix proto

Author: kunga

ydb/core/protos/shared_cache.proto

@@ -11,8 +11,8 @@ message TSharedCacheConfig {
     optional uint64 MemoryLimit = 1 [default = 536870912];
     optional uint64 ScanQueueInFlyLimit = 2 [default = 536870912];
     optional uint64 AsyncQueueInFlyLimit = 3 [default = 536870912];
-    optional uint32 ActivePagesReservationPercent = 4 [default = 50];
-    reserved 5;
+    optional uint32 ActivePagesReservationPercent = 4;
+    optional uint32 MemTableReservationPercent = 5;
     optional TReplacementPolicy ReplacementPolicy = 6 [default = ThreeLeveledLRU];
     reserved 7;
 }