fix: re-enable the ubi arm build (#5833)

.github/workflows/ci.yml

@@ -145,8 +145,8 @@ jobs:
           tag-suffix: "" # distroless
         - dockerfile: "Dockerfile.ubi"
           build-args: "CGO_ENABLED=0"
-          build-arch: "amd64 ppc64le"
-          build-platform: "linux/amd64,linux/ppc64le"
+          build-arch: "amd64 arm64 ppc64le"
+          build-platform: "linux/amd64,linux/arm64,linux/ppc64le"
           tag-suffix: "-ubi"
         - dockerfile: "Dockerfile.ubi"
           build-args: "CGO_ENABLED=0 GOEXPERIMENT=boringcrypto"