fix: Use linux-latest instead of ubuntu-latest

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Co-Authored-By: Claude <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: linux-latest
     steps:
       - uses: actions/checkout@v4
 

.gitea/workflows/release.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   release:
-    runs-on: ubuntu-latest
+    runs-on: linux-latest
     steps:
       - uses: actions/checkout@v4