fix: cvat/requirements/base.txt to reduce vulnerabilities (#4331)

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-2397241

cvat/requirements/base.txt

@@ -6,7 +6,7 @@ django-auth-ldap==2.2.0
 django-compressor==2.4
 django-rq==2.3.2
 EasyProcess==0.3
-Pillow==9.0.0
+Pillow==9.0.1
 numpy==1.22.0
 python-ldap==3.4.0
 pytz==2020.1