Add missing linux arm64 bazel_env entry for aspect-cli

[unterumarmung]

  "aspect": {
    "binaries": [
      {
        "kind": "file",
        "url": "https://github.com/aspect-build/aspect-cli/releases/download/v2026.4.2/aspect-cli-x86_64-unknown-linux-musl",
        "sha256": "58057a7bfb94838749cbb3fedc015baeefa1887caf00e1ed4dd5eb8ef00c6cef",
        "os": "linux",
        "cpu": "x86_64"
      },
      {
        "kind": "file",
        "url": "https://github.com/aspect-build/aspect-cli/releases/download/v2026.4.2/aspect-cli-aarch64-unknown-linux-musl",
        "sha256": "a1f5735753a0417740ab13f69c3591c7e5ba08499e3654f8c8af031008ae8fb6",
        "os": "linux",
        "cpu": "arm64"
      },
      {
        "kind": "file",
        "url": "https://github.com/aspect-build/aspect-cli/releases/download/v2026.4.2/aspect-cli-aarch64-apple-darwin",
        "sha256": "5cae50dcd8a2548ec433833a80d8e0ef3d41965c3673db700f8bbc52e5f15600",
        "os": "macos",
        "cpu": "arm64"
      }
    ]
  },

It is useful to have this inside Linux devcontainer on Apple Silicon