[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

src/pharaoh/templating/second_level/sphinx_ext/asset_ext.py

@@ -87,7 +87,8 @@ def _option_boolean(arg):
         return False
     if arg.strip().lower() in ("yes", "1", "true"):
         return True
-    raise ValueError('"%s" unknown boolean' % arg)
+    msg = f'"{arg}" unknown boolean'
+    raise ValueError(msg)
 
 
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