Update .gitignore

Co-authored-by: Dan King <dan@spiraldb.com>
Signed-off-by: Adam Gutglick <adamgsal@gmail.com>

Author: AdamGS

.gitignore

@@ -239,5 +239,5 @@ sweep.timestamp
 trace*.json
 trace*.pb
 
-# pytest-benchmark output\
+# pytest-benchmark output
 vortex-python/.benchmarks/