Merge pull request #2855 from Sefaria/up_pymongo

chore: update pymongo==4.15.*

Author: akiva10b

requirements.txt

@@ -53,7 +53,7 @@ pillow==10.0.1; sys_platform != 'linux'
 pillow==8.0.1; sys_platform == 'linux'
 psycopg2==2.8.6 #for dev: psycopg2-binary==2.8.6
 py2-py3-django-email-as-username==1.7.1
-pymongo==4.13.*
+pymongo==4.15.*
 pytest~=7.4.4
 python-bidi
 pytz