fix: Video to PDF/requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-IMAGEIO-564348
- https://snyk.io/vuln/SNYK-PYTHON-NUMPY-2321969
- https://snyk.io/vuln/SNYK-PYTHON-NUMPY-2321970
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1055461
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1055462
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1059090
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1080635
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1080654
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1081494
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1081501
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1081502
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1082329
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1082750
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1090584
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1090586
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1090587
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1090588
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1292150
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1292151
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1316216
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-1319443
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-574573
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-574574
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-574575
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-574576
- https://snyk.io/vuln/SNYK-PYTHON-PILLOW-574577

Author: snyk-bot

Video to PDF/requirements.txt

@@ -2,3 +2,5 @@ fpdf==1.7.2
 speech_recognition==3.7.1
 moviepy==1.0.1
 numpy>=1.22.0rc1 # not directly required, pinned by Snyk to avoid a vulnerability
+imageio>=2.6.0 # not directly required, pinned by Snyk to avoid a vulnerability
+pillow>=8.3.2 # not directly required, pinned by Snyk to avoid a vulnerability