Update values.rst

Author: rcseacord

src/coding-guidelines/values.rst

@@ -6,7 +6,7 @@
 Values
 ======
 
-.. guideline:: Do not create values from uninitialized memory
+.. guideline:: Do not create values from or read uninitialized memory
    :id: gui_uyp3mCj77FS8
    :category: required
    :status: draft
@@ -17,10 +17,10 @@ Values
    :tags: undefined-behavior, unsafe, defect
 
    Do not create a typed value from uninitialized memory.
-   Types that explicitly permit an uninitialized state (e.g., ``MaybeUninit<T>`` or a union that includes ``()``) may hold uninitialized bytes as values,
+   Types that explicitly permit an uninitialized state (e.g., ``MaybeUninit<T>`` or a ``union`` that includes ``()``) may hold uninitialized bytes as values,
    but reading any specific typed field still requires initialized and valid bytes. 
 
-   **Exception:** You can access a field of a union when all of the following conditions are met:
+   **Exception:** You can access a field of a ``union`` when all of the following conditions are met:
 
    - All bytes of the field read have been initialized by a prior write.
    - The bytes form a valid representation for the field's type