fixed names in treefmt.yml

.github/workflows/treefmt.yml

@@ -1,4 +1,4 @@
-name: build_systems
+name: treefmt
 on:
   workflow_dispatch:
   pull_request:
@@ -6,10 +6,10 @@ on:
     branches: [main]
 
 jobs:
-  build:
+  treefmt:
     name: nix fmt
     runs-on: self-hosted
     steps:
       - uses: actions/checkout@v4
-      - name: Build default package
+      - name: runs treefmt
         run: "treefmt --ci"