Fix: typo in shadow error message

The error message related to shadow updates in `eevee_shadow.cc`
currently contains a typo:
`"Error: Too many shadow updates, some shadow might be incorrect."`
This sentence should use the plural form of "shadows" to correctly
describe the context.

Fixing this typo ensures clarity and correctness in the error message,
providing developers and users with the appropriate feedback when
encountering shadow update issues.

Pull Request: https://projects.blender.org/blender/blender/pulls/128865

source/blender/draw/engines/eevee_next/eevee_shadow.cc

@@ -652,7 +652,7 @@ void ShadowModule::init()
           shadow_page_len_);
     }
     if (stats.view_needed_count > SHADOW_VIEW_MAX && enabled_) {
-      inst_.info_append_i18n("Error: Too many shadow updates, some shadow might be incorrect.");
+      inst_.info_append_i18n("Error: Too many shadow updates, some shadows might be incorrect.");
     }
   }