doc gen update

Author: sinhp

lake-manifest.json

@@ -15,7 +15,7 @@
    "type": "git",
    "subDir": null,
    "scope": "",
-   "rev": "3cfe59e73325809509831ef285891b6ebd02da62",
+   "rev": "dd5e5d97469dec395f29661366030566355ad9be",
    "name": "mathlib",
    "manifestFile": "lake-manifest.json",
    "inputRev": null,

lakefile.lean

@@ -19,4 +19,4 @@ require checkdecls from git "https://github.com/PatrickMassot/checkdecls.git"
 
 meta if get_config? env = some "dev" then
 require «doc-gen4» from git
-  "https://github.com/leanprover/doc-gen4" @ "v4.25.0-rc2"
+  "https://github.com/leanprover/doc-gen4" @ "v4.27.0-rc1"