update to llvm 21.1.2

Philipp Grulich · Philipp Grulich · commit d5c6e0e7b7ee · 2025-10-05T18:36:25.000+02:00
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
@@ -1,7 +1,7 @@
 name: NES MLIR builder
 
 env:
-  MLIR_VERSION: 20.1.7
+  MLIR_VERSION: 21.1.2
 
 on:
   push:
diff --git a/llvm-project b/llvm-project
@@ -1 +1 @@
-Subproject commit 6146a88f60492b520a36f8f8f3231e15f3cc6082
+Subproject commit b708aea0bc7127adf4ec643660699c8bcdde1273
