fix tx writing limit (#10810)

Author: ivanmorozov333

ydb/core/tx/columnshard/common/limits.h

@@ -4,7 +4,7 @@
 namespace NKikimr::NOlap {
 class TGlobalLimits {
 public:
-    static constexpr inline ui64 TxWriteLimitBytes = 312 * 1024 * 1024;
+    static constexpr inline ui64 TxWriteLimitBytes = 256 * 1024 * 1024;
     static constexpr inline ui64 TTLCompactionMemoryLimit = 1ULL << 30;
     static constexpr inline ui64 InsertCompactionMemoryLimit = 1ULL << 30;
     static constexpr inline ui64 GeneralCompactionMemoryLimit = 3ULL << 30;