fix: requirements-freqai.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-6219984
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-6219986

requirements-freqai.txt

@@ -12,6 +12,6 @@ tensorboard==2.15.1
 datasieve==0.1.7
 
 numpy>=1.22.2 # not directly required, pinned by Snyk to avoid a vulnerability
-pillow>=10.0.1 # not directly required, pinned by Snyk to avoid a vulnerability
+pillow>=10.2.0 # not directly required, pinned by Snyk to avoid a vulnerability
 fonttools>=4.43.0 # not directly required, pinned by Snyk to avoid a vulnerability