chore: bump mathlib to c9ba310: chore(FieldTheory/Galois/IsGaloisGroup): generalize IsGaloisGroup.of_ringEquiv to surjective ring homs (#40805) (2026-06-19)

Author: mathlib-nightly-testing[bot]

lake-manifest.json

@@ -5,10 +5,10 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "360da6fa66c1273b76b6b2d8c5666fd5ac2e3b56",
+   "rev": "c9ba3100f3ae30fffc9f6d2bbfe033dcd44ce577",
    "name": "mathlib",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "360da6fa66c1273b76b6b2d8c5666fd5ac2e3b56",
+   "inputRev": "c9ba3100f3ae30fffc9f6d2bbfe033dcd44ce577",
    "inherited": false,
    "configFile": "lakefile.lean"},
   {"url": "https://github.com/leanprover-community/plausible",
@@ -75,7 +75,7 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "954dbc9873f3b4534dc9896604593406d0383520",
+   "rev": "125807f43a86b5d58892b7ea6972eec0d6c164d2",
    "name": "batteries",
    "manifestFile": "lake-manifest.json",
    "inputRev": "main",

lakefile.toml

@@ -18,7 +18,7 @@ weak.linter.unicodeLinter = false
 [[require]]
 name = "mathlib"
 scope = "leanprover-community"
-rev = "360da6fa66c1273b76b6b2d8c5666fd5ac2e3b56"
+rev = "c9ba3100f3ae30fffc9f6d2bbfe033dcd44ce577"
 
 [[lean_lib]]
 name = "Cslib"