Fix some minor lint issues

dangerzone/conversion/pixels_to_pdf.py

@@ -4,6 +4,7 @@ Here are the steps, with progress bar percentages:
 - 50%-95%: Convert each page of pixels into a PDF (each page takes 45/n%, where n is the number of pages)
 - 95%-100%: Compress the final PDF
 """
+
 import asyncio
 import contextlib
 import glob

install/linux/build-rpm.py

@@ -6,7 +6,6 @@ import os
 import shutil
 import subprocess
 import tempfile
-
 from pathlib import Path
 
 root = Path(__file__).parent.parent.parent