update requirements.txt

requirements.txt

@@ -1,5 +1,5 @@
 gradio>=4.0
-#marker==1.3.0          # pip install marker (GitHub: https://github.com/datalab-to/marker)
+marker>=1.3.0           # pip install marker (GitHub: https://github.com/datalab-to/marker)
 #pandoc==2.3            # for Markdown → PDF conversion
-#weasyprint==59.0       # optional fallback if pandoc is not available
-python-magic==0.4.27   # file‑type detection
+#weasyprint>=59.0       # optional fallback if pandoc is not available
+python-magic==0.4.27    # file‑type detection