workflows: set action names

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

.gitea/workflows/nix.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   tests:
-    name: nix-flake-check
+    name: NixOS tests
     runs-on: ubuntu-latest
     steps:
       - name: Checkout

.gitea/workflows/release.yml

@@ -7,6 +7,7 @@ on:
 
 jobs:
   release:
+    name: Release
     runs-on: ubuntu-latest
     container:
       image: node:16-bookworm-slim

.gitea/workflows/test.yml

@@ -6,6 +6,7 @@ on:
 
 jobs:
   test:
+    name: Go tests
     runs-on: ubuntu-latest
     container:
       image: node:16-bookworm-slim