Bump Python requirement sh to 2.0.6

requirements.txt

@@ -4,7 +4,7 @@ Pillow==9.5.0
 pymdown-extensions==10.0.1
 python-gitlab==3.14.0
 python-gnupg==0.5.0
-sh==2.0.4
+sh==2.0.6
 shapely==2.0.1
 tenacity==8.2.3
 zstandard==0.21.0