README: format links to local files in a way that markdown will render them

README.md

@@ -6,18 +6,18 @@ this is the top-level repo from which i configure/deploy all my NixOS machines:
 - server
 - mobile phone (Pinephone)
 
-everything outside of <./hosts/> and <./secrets/> is intended for export, to be importable for use by 3rd parties.
+everything outside of [hosts/](./hosts/) and [secrets/](./secrets/) is intended for export, to be importable for use by 3rd parties.
 the only hard dependency for my exported pkgs/modules should be [nixpkgs][nixpkgs].
-building <./hosts/> will require [sops][sops].
+building [hosts/](./hosts/) will require [sops][sops].
 
 you might specifically be interested in these files (elaborated further in #key-points-of-interest):
 - [`sxmo-utils`](./pkgs/additional/sxmo-utils/default.nix)
   - [example SXMO deployment](./hosts/modules/gui/sxmo/default.nix)
 - [my implementation of impermanence](./modules/persist/default.nix)
 - my way of deploying dotfiles/configuring programs per-user:
-  - <./modules/fs/default.nix>
-  - <./modules/programs.nix>
-  - <./modules/users.nix>
+  - [modules/fs/](./modules/fs/default.nix)
+  - [modules/programs/](./modules/programs/default.nix)
+  - [modules/users.nix](./modules/users.nix)
 
 [nixpkgs]: https://github.com/NixOS/nixpkgs
 [sops]: https://github.com/Mic92/sops-nix
@@ -94,7 +94,7 @@ i.e. you might find value in using these in your own config:
         - persist things to encrypted storage which is unlocked at login time (pam_mount).
         - "persist" cache directories -- to free up RAM -- but auto-wipe them on mount
           and encrypt them to ephemeral keys so they're unreadable post shutdown/unmount.
-- `modules/programs.nix`
+- `modules/programs/`
     - like nixpkgs' `programs` options, but allows both system-wide or per-user deployment.
     - allows `fs` and `persist` config values to be gated behind program deployment:
         - e.g. `/home/<user>/.mozilla/firefox` is persisted only for users who