Fix name string

Author: tstellar

.github/workflows/build-ci-container.yml

@@ -21,7 +21,7 @@ on:
 
 jobs:
   build-ci-container:
-    name: Build Container ${{ matrix.container-name }} ${{ matrix.runs-on }}
+    name: Build Container ${{ matrix.container-name }} ${{ (contains(matrix.runs-on, "arm") && "ARM64") || "X64" }}
     if: github.repository_owner == 'llvm'
     runs-on: ${{ matrix.runs-on }}
     strategy: