docs: replace em-dashes with ASCII hyphens in intro.md

Author: markovejnovic

docs/cookbook/intro.md

@@ -21,38 +21,38 @@ The absolute best way to get started with `Hyper` is to play with it.
 
 #### External services
 
-Hyper needs a **PostgreSQL** server reachable from every node — it is the image
+Hyper needs a **PostgreSQL** server reachable from every node - it is the image
 database and the only stateful external dependency.
 
 #### System binaries
 
 The following must be on each node's `PATH` (the bracketed override is the
 `config :hyper` key you can set if the binary lives elsewhere):
 
-  - [`skopeo`](https://github.com/containers/skopeo) — pulls OCI images
+  - [`skopeo`](https://github.com/containers/skopeo) - pulls OCI images
     (`skopeo_path`)
-  - [`e2fsprogs`](https://github.com/tytso/e2fsprogs) — provides `mke2fs`, which
+  - [`e2fsprogs`](https://github.com/tytso/e2fsprogs) - provides `mke2fs`, which
     builds the ext4 rootfs (`mke2fs_path`)
-  - `losetup`, `blockdev` (from **util-linux**) — loop-device setup
+  - `losetup`, `blockdev` (from **util-linux**) - loop-device setup
     (`losetup_path`, `blockdev_path`)
-  - `dmsetup` (from **lvm2** / device-mapper) — dm-snapshot and thin-pool
-    layering (`dmsetup_path`). Frequently *not* installed by default — check
+  - `dmsetup` (from **lvm2** / device-mapper) - dm-snapshot and thin-pool
+    layering (`dmsetup_path`). Frequently *not* installed by default - check
     this one first.
-  - `du`, `getent` (from **coreutils** and **glibc**) — rootfs sizing and user
+  - `du`, `getent` (from **coreutils** and **glibc**) - rootfs sizing and user
     resolution. Present on essentially every distro.
 
 #### Kernel features
 
 The host kernel must provide:
 
-  - **KVM** — `/dev/kvm` must exist and be accessible to the per-VM users (see
+  - **KVM** - `/dev/kvm` must exist and be accessible to the per-VM users (see
     the `uid_gid_range` configuration).
-  - **cgroup v2** — the unified hierarchy mounted at `/sys/fs/cgroup`. v1-only
+  - **cgroup v2** - the unified hierarchy mounted at `/sys/fs/cgroup`. v1-only
     hosts are not supported.
-  - **device-mapper targets** `snapshot`, `thin`, and `thin-pool` — load the
+  - **device-mapper targets** `snapshot`, `thin`, and `thin-pool` - load the
     `dm_snapshot` and `dm_thin_pool` modules (`modprobe dm_snapshot
     dm_thin_pool`). Hyper refuses to start its device helper without them.
-  - **loop devices** — the `loop` module, used to attach layer images as block
+  - **loop devices** - the `loop` module, used to attach layer images as block
     devices.
 
 #### Privileged setup
@@ -68,8 +68,8 @@ The host kernel must provide:
 
 #### Auto-redistributed
 
-The remaining runtime dependencies — `firecracker`, `jailer`, `umoci`, and the
-guest `vmlinux` kernels — are downloaded, checksum-verified, and managed by
+The remaining runtime dependencies - `firecracker`, `jailer`, `umoci`, and the
+guest `vmlinux` kernels - are downloaded, checksum-verified, and managed by
 Hyper itself; you do not install them.
 
 ### Installation