updated docs

Signed-off-by: Nwusongqing <wusongqing@huawei.com>

en/contribute/OpenHarmony-cpp-coding-style-guide.md

@@ -2651,7 +2651,7 @@ void func()
 ```
 
 ## <a name="c10-2"></a> Smart Pointers
-### <a name="r10-2-1"></a>Rule 10.2.1 Preferentially use the original pointer source instead of the smart pointer for singletons and class members that are not held by multiple parties.
+### <a name="r10-2-1"></a>Rule 10.2.1 Preferentially use the original pointer instead of the smart pointer for singletons and class members that are not held by multiple parties.
 **Reason:**
 Smart pointers automatically release object resources to prevent resource leakage, but they require extra resource overheads. For example, the classes, constructors, and destructors automatically generated by smart pointers consume more resources such as memory.