fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-CERTIFI-3164749
- https://snyk.io/vuln/SNYK-PYTHON-CERTIFI-5805047
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-5663682
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-5777683
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-5813745
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-5813746
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-5813750
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-5914629
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-6036192
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-6092044
- https://snyk.io/vuln/SNYK-PYTHON-FLASK-5490129
- https://snyk.io/vuln/SNYK-PYTHON-REQUESTS-5595532
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-5926907
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-6002459
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-3319935
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-3319936
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-6035177

requirements.txt

@@ -14,7 +14,7 @@ botocore==1.22.0
     #   s3transfer
 cachelib==0.1.1
     # via flask-session
-certifi==2019.11.28
+certifi==2023.7.22
     # via requests
 cffi==1.14.0
     # via cryptography
@@ -24,7 +24,7 @@ click==7.0
     # via flask
 contextlib2==0.6.0.post1
     # via digitalmarketplace-utils
-cryptography==39.0.1
+cryptography==41.0.6
     # via digitalmarketplace-utils
 defusedxml==0.6.0
     # via odfpy
@@ -42,7 +42,7 @@ docopt==0.6.2
     # via notifications-python-client
 email-validator==1.3.1
     # via -r requirements.in
-flask==1.1.4
+flask==2.2.5
     # via
     #   -r requirements.in
     #   digitalmarketplace-content-loader
@@ -122,7 +122,7 @@ pyyaml==5.4
     # via digitalmarketplace-content-loader
 redis==3.5.3
     # via digitalmarketplace-utils
-requests==2.26.0
+requests==2.31.0
     # via
     #   digitalmarketplace-apiclient
     #   digitalmarketplace-utils
@@ -134,11 +134,11 @@ six==1.14.0
     # via python-dateutil
 unicodecsv==0.14.1
     # via digitalmarketplace-utils
-urllib3==1.26.5
+urllib3==1.26.18
     # via
     #   botocore
     #   requests
-werkzeug==1.0.1
+werkzeug==2.3.8
     # via
     #   flask
     #   flask-login