Merge branch 'main' of https://github.com/Mdr-C-Tutorial/C

docs/教程/正文/语法和标准库/2_初识C/2_3_C对象_初步.md

@@ -49,7 +49,7 @@ int a = {};  // C23 起
 ### 4.2 关键字
 
 1. **类型**：`_Bool(bool)` `char` `double` `float` `int` `long` `short` `signed` `unsigned` `void` `_Complex`
-   `_Decimal32` `_Decimal64` `_Decimal128` `_Imaginary` `_BigInt`
+   `_Decimal32` `_Decimal64` `_Decimal128` `_Imaginary` `_BitInt`
 2. **指定符和限定符**：`inline` `restrict` `_Alignas(alignas)` `_Atomic` `_Generic`
 3. **常量**：`true` `false` `nullptr`
 4. **控制语句** 相关：`break` `case` `continue` `default` `do` `else` `for` `goto` `if` `return` `switch` `while`