fix: correct Python indentation in publish.yml

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

.github/workflows/publish.yml

@@ -45,7 +45,7 @@ with open(os.environ["GITHUB_OUTPUT"], "a", encoding="utf-8") as f:
 if exists:
     print(f"Build {sha} already present on CDN; skipping packaging.")
 else:
-        print(f"Build {sha} not found on CDN; continuing.")
+    print(f"Build {sha} not found on CDN; continuing.")
 PY
 
     - name: Cache NuGet packages