Bump mathlib dependency to a8f44fc (#291)

Author: RemyDegenne

lake-manifest.json

@@ -5,10 +5,10 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "1b1ccf4b088b32fa3f23f2de1127433254a81e1e",
+   "rev": "a8f44fceb38c0acddb16afe7869b3be862567094",
    "name": "mathlib",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "1b1ccf4b088b32fa3f23f2de1127433254a81e1e",
+   "inputRev": "a8f44fceb38c0acddb16afe7869b3be862567094",
    "inherited": false,
    "configFile": "lakefile.lean"},
   {"url": "https://github.com/leanprover/verso",

lakefile.toml

@@ -17,7 +17,7 @@ rev = "v4.36.0-rc2"
 [[require]]
 name = "mathlib"
 scope = "leanprover-community"
-rev = "1b1ccf4b088b32fa3f23f2de1127433254a81e1e"
+rev = "a8f44fceb38c0acddb16afe7869b3be862567094"
 
 [[lean_lib]]
 name = "LeanMachineLearning"