fix: update alt text for log icon and correct dropdown dependency (#41432)

- Changed the alt text for the log icon from "icon" to "Plugin icon" for better accessibility.
- Fixed a dependency issue in the useDropdown hook by replacing handleOnDropdownOpen with handleOnDropdownClose in the dependency array.

Author: pratapaprasanna

app/client/src/ce/components/editorComponents/Debugger/ErrorLogs/getLogIconForEntity.tsx

@@ -47,7 +47,7 @@ export const getIconForEntity: IconEntityMapper = {
       );
     }
 
-    return <img alt="icon" />;
+    return <img alt="Plugin icon" />;
   },
   [DEBUGGER_ENTITY_TYPE.GIT]: () => {
     return <Icon name="git-repository" />;

app/client/src/widgets/useDropdown.tsx

@@ -91,7 +91,7 @@ const useDropdown = ({
         selectRef.current?.blur();
       }
     },
-    [renderMode, handleOnDropdownOpen, handleOnDropdownOpen],
+    [renderMode, handleOnDropdownOpen, handleOnDropdownClose],
   );
 
   const closeBackDrop = useCallback(() => {