fix: bump minimum chrome version to 121

https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/background#browser_support

Author: AprilSylph

src/manifest.json

@@ -24,7 +24,7 @@
     "scripting"
   ],
 
-  "minimum_chrome_version": "102",
+  "minimum_chrome_version": "121",
   "browser_specific_settings": {
     "gecko": {
       "id": "{fb1afd1b-278d-440b-80e5-91ec9b5e8a16}",