Gudes with links that no longer work

[cob16]

These guides look to be out of date:

• https://github.com/madetech/handbook/blob/main/guides/process/scheduling/setting_up_projects.md as it references the harvest tool
• https://github.com/madetech/handbook/blob/main/guides/policy/whistleblowing_policy.md as pcaw.co.uk no longer exists
• https://github.com/madetech/handbook/blob/main/guides/policy/dealing_code_policy.md links to FCA pages that no longer exist
• https://github.com/madetech/handbook/blob/main/benefits/made_tech_benefits_box.md links to a 404

[sbt92]

Had a brief look at these it looks like the only ones that still require action are:

• https://github.com/madetech/handbook/blob/main/guides/policy/dealing_code_policy.md links to FCA pages that no longer exist