Bump pyyaml from 5.3.1 to 5.4 in /OCR_To_Google_Question_Papers (#125)

Security update: Bump pyyaml

Author: dependabot[bot]

OCR_To_Google_Question_Papers/requirements.txt

@@ -15,7 +15,7 @@ nltk==3.6.6
 Pillow==7.2.0
 pytesseract==0.3.5
 python-dateutil==2.8.1
-PyYAML==5.3.1
+PyYAML==5.4
 regex==2020.7.14
 requests==2.24.0
 requests-file==1.5.1