Add support for SM-S918B-Oneui8 branch in workflow

.github/workflows/kernel-samsung.yml

@@ -45,6 +45,9 @@ jobs:
           - branch: "SM-S926B-Oneui8"
             android_version: "android14"
             kernel_version: "6.1"
+          - branch: "SM-S918B-Oneui8"
+            android_version: "android13"
+            kernel_version: "5.15"
 
     uses: ./.github/workflows/build.yml
     secrets: inherit