Change dependency groups (#7665)

* Add `ahash` to `random` group

* Add `unix` group with `nix`, `mac_address`, and `rustyline`

.github/dependabot.yml

@@ -82,6 +82,7 @@ updates:
           - "quote-use*"
       random:
         patterns:
+          - "ahash"
           - "getrandom"
           - "mt19937"
           - "rand*"
@@ -120,6 +121,11 @@ updates:
       toml:
         patterns:
           - "toml*"
+      unix:
+        patterns:
+          - "mac_address"
+          - "nix"
+          - "rustyline"
       wasm-bindgen:
         patterns:
           - "wasm-bindgen*"