docs/zh_CN: Update the translation of kernel-api to 6.1-rc8

Update to commit d28a1de5 ("math64: favor kernel-doc
from header files").

Commit 03699f27 ("string: Rewrite and add more kern-doc
for the str*() functions").
Commit 31970608 ("overflow: Fix kern-doc markup for
functions")
Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
Link: https://lore.kernel.org/r/46930487845717a6a718dbb6493864dee125ea1b.1670642548.git.siyanteng@loongson.cnSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/translations/zh_CN/core-api/kernel-api.rst

@@ -48,6 +48,8 @@ lib/string_helpers.c
 
 该API在以下内核代码中:
 
+include/linux/fortify-string.h
+
 lib/string.c
 
 include/linux/string.h
@@ -119,6 +121,12 @@ include/linux/textsearch.h
 Linux中的CRC和数学函数
 ======================
 
+算术溢出检查
+------------
+
+该API在以下内核代码中:
+
+include/linux/overflow.h
 
 CRC函数
 -------
@@ -166,8 +174,6 @@ include/asm-generic/div64.h
 
 include/linux/math64.h
 
-lib/math/div64.c
-
 lib/math/gcd.c
 
 UUID/GUID