📚 Documentation: Update Textmagic and Sendgrid screenshots

[choir241]

💭 Description

Replace the following screenshots with the updated Textmagic and/or Sendgrid icons:

• [x] Mailgun
• [x] Sendgrid
• [x] Smtp
• [x] Twilio
• [x] Msg91
• [x] Telesign
• [x] Textmagic
• [x] Vonage

👀 Have you spent some time to check if this issue has been raised before?

• [X] I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• [X] I have read the Code of Conduct

[iamAyushChamoli]

@choir27 Can you check and verify the updated screenshots?

[choir241]

@choir27 Can you check and verify the updated screenshots?

LGTM, nice job!! ^^