Add content: Array initialization examples in C++ roadmap

Added examples for partial and zero array initialization. Fixed typo.

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Co-Authored-By: Claude <noreply@anthropic.com>

src/data/roadmaps/cpp/content/data-types@MwznA4qfpNlv6sqSNjPZi.md

@@ -60,6 +60,8 @@ Arrays are used to store multiple values of the same data type in consecutive me
 Example:
 ```cpp
 int numbers[5] = {1, 2, 3, 4, 5};
+int scores[10] = {100,95,98}; // Partially initialized array. 100,95,98 initialized on first 3 indexes, rest indexes are initialized with 0
+int allZero[0] = {0};         // initialized all to zero 
 ```
 
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