Fix issues in twilio API docs

[anupama-pathirage]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)

Related Pull Requests (remove if not relevant)

• Pull request 1
• Pull request 2

One line release note:

• One line describing the feature/improvement/fix made by this PR

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A
• Test B

Test Configuration:

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• Java SDK:

Checklist:

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines?
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets?

[anupama-pathirage]

@NipunaRanasinghe Resolved the conflicts and appreciate if you can re-approve.