Apply suggestions from code review

Author: jkotas

xml/System.Runtime.InteropServices/Marshal.xml

@@ -3946,7 +3946,7 @@ The code retrieves a reference to an instance of Microsoft Word successfully. Ho
 
  You must manually keep the delegate from being collected by the garbage collector from managed code. The garbage collector does not track references to unmanaged code.
 
- This API is unsupported in environments that do not support dynamic entrypoint allocation, such as ProcessDynamicCodePolicy on Windows or WebAssembly.
+ This API is unsupported in environments that do not support dynamic entrypoint allocation, such as `ProcessDynamicCodePolicy` on Windows, `execmem off` in SELinux, or WebAssembly.
 
  It is recommended to use function pointers and (xref:System.Runtime.InteropServices.UnmanagedCallersOnlyAttribute) instead. Function pointers are more efficient, easier to use correctly, and supported in all environments.
 
@@ -4020,7 +4020,7 @@ The code retrieves a reference to an instance of Microsoft Word successfully. Ho
 
  You must manually keep the delegate from being collected by the garbage collector from managed code. The garbage collector does not track references to unmanaged code.
 
- This API is unsupported in environments that do not support dynamic entrypoint allocation, such as ProcessDynamicCodePolicy on Windows or WebAssembly.
+ This API is unsupported in environments that do not support dynamic entrypoint allocation, such as `ProcessDynamicCodePolicy` on Windows, `execmem off` in SELinux, or WebAssembly.
 
  It is recommended to use function pointers and (xref:System.Runtime.InteropServices.UnmanagedCallersOnlyAttribute) instead. Function pointers are more efficient, easier to use correctly, and supported in all environments.
  ]]></format>