flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/6201e20' (2026-04-01)
  → 'github:nixos/nixpkgs/e73de5b' (2026-06-26)

FORK_CHANGELOG.md

@@ -14,9 +14,21 @@ This file records every intentional divergence from upstream Gitea.
 ## 0.1.0-planning
 
 - Created AtayMakhzan fork identity documentation.
+- Created public source-fork remote at `ibnezzoubayr/Atay-Makhzan`.
+- Pushed branch `atay/v1.26.2` as the default branch.
 - No source-code behavior changes yet.
 - No database, auth, Git transport, or permission changes.
 
+Verification on 2026-06-20:
+
+- Local Go toolchain: `go1.26.4 linux/amd64`.
+- `make deps-backend` passed.
+- `make deps-frontend` passed.
+- `make build` passed.
+- Built binary smoke: `./gitea --version` passed.
+- `make test-frontend` passed: 35 files, 92 tests.
+- Backend smoke tests passed: `go test ./modules/setting ./modules/util -count=1`.
+
 ## Divergence rules
 
 Every future entry must include:

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1775036866,
-        "narHash": "sha256-ZojAnPuCdy657PbTq5V0Y+AHKhZAIwSIT2cb8UgAz/U=",
+        "lastModified": 1782467914,
+        "narHash": "sha256-pGvFkM8N0xEkIIXDe5YYfbEAvHrk4IxBrjB/x8OomhE=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "6201e203d09599479a3b3450ed24fa81537ebc4e",
+        "rev": "e73de5be04e0eff4190a1432b946d469c794e7b4",
         "type": "github"
       },
       "original": {