b1c1: uprev clang to 20.1.4

Signed-off-by: Onelots <onelots@onelots.fr>

Author: onelots

.github/workflows/kernel_build_b1c1.yml

@@ -65,7 +65,7 @@ jobs:
       - name: 🔧 Install Clang from a Github action
         uses: KyleMayes/install-llvm-action@v2
         with:
-          version: "18.1.8"
+          version: "20.1.4"
           directory: ${{ runner.temp }}/llvm
 
       - name: 🔧 Add Clang to the PATH