Update src/background.summary.test.ts

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: shouri123

src/background.summary.test.ts

@@ -107,9 +107,9 @@ function installChromeMock() {
         },
       },
       session: {
-        get: async (key: string) => ({ openai_api_key: "foo" }),
-        set: async (items: any) => {},
-        remove: async (key: string) => {},
+        get: async (_key: string) => ({ openai_api_key: "foo" }),
+        set: async (_items: any) => {},
+        remove: async (_key: string) => {},
       },
     },
   };