flake.lock: Update

Flake lock file updates:

• Updated input 'emacs-overlay':
    'github:nix-community/emacs-overlay/3b4f8179de2b4950540d70161854e43fe1010eae' (2024-08-16)
  → 'github:nix-community/emacs-overlay/e197771f35c8c330324256c5f306614f273ffd9d' (2024-08-20)
• Updated input 'emacs-overlay/nixpkgs':
    'github:NixOS/nixpkgs/c3aa7b8938b17aebd2deecf7be0636000d62a2b9' (2024-08-14)
  → 'github:NixOS/nixpkgs/8a3354191c0d7144db9756a74755672387b702ba' (2024-08-18)
• Updated input 'emacs-overlay/nixpkgs-stable':
    'github:NixOS/nixpkgs/c3d4ac725177c030b1e289015989da2ad9d56af0' (2024-08-15)
  → 'github:NixOS/nixpkgs/c42fcfbdfeae23e68fc520f9182dde9f38ad1890' (2024-08-17)
• Updated input 'extra-package-indent-bars':
    'github:jdtsmith/indent-bars/209817a622e2fbf9201a6c756928c9f320431449' (2024-08-12)
  → 'github:jdtsmith/indent-bars/b72fa098d7c48d61fb4b508071bd77d054268f4e' (2024-08-18)

flake.lock

@@ -7,11 +7,11 @@
         "nixpkgs-stable": "nixpkgs-stable"
       },
       "locked": {
-        "lastModified": 1724055554,
-        "narHash": "sha256-qg/+f8DxrhW53m8F2Ak5nVmQznZRDYV2BvS6LTM7qRI=",
+        "lastModified": 1724119075,
+        "narHash": "sha256-rZe4WgHhLqhu4NjGVYyIQ36ieHZgSkfnNMdLzKaqFQk=",
         "owner": "nix-community",
         "repo": "emacs-overlay",
-        "rev": "b5a543194c6156e121a974a8710c52476c0e30d4",
+        "rev": "e197771f35c8c330324256c5f306614f273ffd9d",
         "type": "github"
       },
       "original": {
@@ -226,11 +226,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1723637854,
-        "narHash": "sha256-med8+5DSWa2UnOqtdICndjDAEjxr5D7zaIiK4pn0Q7c=",
+        "lastModified": 1723991338,
+        "narHash": "sha256-Grh5PF0+gootJfOJFenTTxDTYPidA3V28dqJ/WV7iis=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "c3aa7b8938b17aebd2deecf7be0636000d62a2b9",
+        "rev": "8a3354191c0d7144db9756a74755672387b702ba",
         "type": "github"
       },
       "original": {