chore(meta): update meta files

Casks/emacs-app-good/meta.json

@@ -133,7 +133,7 @@
   "disable_reason": null,
   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "841873d29c71e8fa73bc930ad702faa40ef8ae5b",
+  "tap_git_head": "9b064a64f8eae3bce6b4e4e2314f90068fcad9e6",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-good.rb",
   "ruby_source_checksum": {

Casks/emacs-app-monthly/meta.json

@@ -132,7 +132,7 @@
   "disable_reason": null,
   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "841873d29c71e8fa73bc930ad702faa40ef8ae5b",
+  "tap_git_head": "9b064a64f8eae3bce6b4e4e2314f90068fcad9e6",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-monthly.rb",
   "ruby_source_checksum": {

Casks/emacs-app-nightly-28/meta.json

@@ -133,7 +133,7 @@
   "disable_reason": null,
   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "841873d29c71e8fa73bc930ad702faa40ef8ae5b",
+  "tap_git_head": "9b064a64f8eae3bce6b4e4e2314f90068fcad9e6",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-nightly-28.rb",
   "ruby_source_checksum": {

Casks/emacs-app-nightly-29/meta.json

@@ -133,7 +133,7 @@
   "disable_reason": null,
   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "841873d29c71e8fa73bc930ad702faa40ef8ae5b",
+  "tap_git_head": "9b064a64f8eae3bce6b4e4e2314f90068fcad9e6",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-nightly-29.rb",
   "ruby_source_checksum": {

Casks/emacs-app-nightly/meta.json

@@ -8,9 +8,9 @@
   ],
   "desc": "GNU Emacs text editor (nightly build)",
   "homepage": "https://github.com/jimeh/emacs-builds",
-  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-08-20.33adf9e.master/Emacs.2025-08-20.33adf9e.master.macOS-11.arm64.dmg",
+  "url": "https://github.com/jimeh/emacs-builds/releases/download/Emacs.2025-08-21.680ef7b.master/Emacs.2025-08-21.680ef7b.master.macOS-11.arm64.dmg",
   "url_specs": {},
-  "version": "2025-08-20.33adf9e.master",
+  "version": "2025-08-21.680ef7b.master",
   "autobump": true,
   "no_autobump_message": null,
   "skip_livecheck": false,
@@ -19,7 +19,7 @@
   "bundle_version": null,
   "bundle_short_version": null,
   "outdated": false,
-  "sha256": "18451007116716812ef2bb1099840d3cdfab4944fb7de0974a1c6a5cc8c9e38d",
+  "sha256": "666fc93864d97b4f38779fa39e5172f5c613dcb94d515798f7e424dd5f2c2b5a",
   "artifacts": [
     {
       "app": [
@@ -133,10 +133,10 @@
   "disable_reason": null,
   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "841873d29c71e8fa73bc930ad702faa40ef8ae5b",
+  "tap_git_head": "9b064a64f8eae3bce6b4e4e2314f90068fcad9e6",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-nightly.rb",
   "ruby_source_checksum": {
-    "sha256": "29e311b3c37b8706e85e07b94fceed00bc4a840a7c21c60b1b8c3a1ae9e4322a"
+    "sha256": "f6db089a8b58f3ec30e5b3b5a12abb42749fe52e52cd2f651eb3d12f366f2af8"
   }
 }

Casks/emacs-app-nightly/shield.json

@@ -5,5 +5,5 @@
   "namedLogo": "GNU Emacs",
   "logoColor": "white",
   "label": "nightly",
-  "message": "2025-08-20.33adf9e.master"
+  "message": "2025-08-21.680ef7b.master"
 }

Casks/emacs-app-pretest/meta.json

@@ -133,7 +133,7 @@
   "disable_reason": null,
   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "841873d29c71e8fa73bc930ad702faa40ef8ae5b",
+  "tap_git_head": "9b064a64f8eae3bce6b4e4e2314f90068fcad9e6",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app-pretest.rb",
   "ruby_source_checksum": {

Casks/emacs-app/meta.json

@@ -133,7 +133,7 @@
   "disable_reason": null,
   "disable_replacement_formula": null,
   "disable_replacement_cask": null,
-  "tap_git_head": "841873d29c71e8fa73bc930ad702faa40ef8ae5b",
+  "tap_git_head": "9b064a64f8eae3bce6b4e4e2314f90068fcad9e6",
   "languages": [],
   "ruby_source_path": "Casks/emacs-app.rb",
   "ruby_source_checksum": {