ci: move lint.yml to .gitea/workflows so Gitea Actions discovers it

Gitea Actions only scans .gitea/workflows/ and .github/workflows/. The
file under gitea/workflows/ (no leading dot) was never picked up. Other
files in gitea/workflows/ remain as templates copied into consumer repos.

.gitea/workflows/lint.yml

@@ -14,14 +14,14 @@ on:
       - '**.psm1'
       - '**.py'
       - 'pyproject.toml'
-      - 'gitea/workflows/lint.yml'
+      - '.gitea/workflows/lint.yml'
   pull_request:
     paths:
       - '**.ps1'
       - '**.psm1'
       - '**.py'
       - 'pyproject.toml'
-      - 'gitea/workflows/lint.yml'
+      - '.gitea/workflows/lint.yml'
 
 jobs:
   pssa: