deps: bumped certifi==2024.7.4 for security fix

requirements.txt

@@ -66,7 +66,7 b' channelstream==0.7.1'
   python-dateutil==2.9.0.post0
     six==1.16.0
   requests==2.28.2
-    certifi==2022.12.7
+    certifi==2024.7.4
     charset-normalizer==3.1.0
     idna==3.4
     urllib3==1.26.19
@@ -175,7 +175,7 b' premailer==3.10.0'
   cssutils==2.6.0
   lxml==5.3.0
   requests==2.28.2
-    certifi==2022.12.7
+    certifi==2024.7.4
     charset-normalizer==3.1.0
     idna==3.4
     urllib3==1.26.19