Added Otterize as new participant

[Arcturus22]

• I have read and understand the Contributing.md guidelines
• I do not intend to make low-value changes, just for swag. I am aware that my PR could otherwise be flagged as spam or invalid and may lead to permanent exclusion from the Hacktoberfest event.

Adding a new Hacktoberfest participant

• I did not edit the README.md file by hand
• I have checked to ensure the new participant is not a duplicate and has not already been added
• I am not adding a company from the blocklist
• I have added the participant according to the Contributing.md guidelines

Updating an existing Hacktoberfest participant

• I did not edit the README.md file by hand
• I have updated the existing participant.yml file according to the Contributing.md guidelines

Removing a participant

• I did not edit the README.md file by hand
• I have checked to ensure the participant is not participating this year
• I have provided evidence that the participant is not participating this year

Updating the README.md

• I have discussed the proposed changes and received approval from a maintainer (@benbarth, @SoftCreatR, or @crweiner)

[SoftCreatR]

Please just put the URL into the details section.

[Arcturus22]

@SoftCreatR
I have done that. Kindly review and suggest other changes (if any).