fix: disable Git LFS in clone step

LFS is not installed in the Woodpecker runner and not needed for
this repo anyway.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.woodpecker/pr.yml

@@ -2,6 +2,10 @@
 when:
   - event: pull_request
 
+clone:
+  git:
+    lfs: false
+
 steps:
   - name: restore
     image: mcr.microsoft.com/dotnet/sdk:10.0-preview

.woodpecker/release.yml

@@ -3,6 +3,10 @@ when:
   - event: push
     branch: main
 
+clone:
+  git:
+    lfs: false
+
 steps:
   - name: restore
     image: mcr.microsoft.com/dotnet/sdk:10.0-preview