Updating to new mental health page link (#8606)

content/index.md

@@ -128,7 +128,7 @@ Want to join our team? See [open roles](https://about.sourcegraph.com/jobs/).
   - [Spending company money - what's covered](benefits-pay-perks/benefits-perks/spending-company-money.md)
   - [Travel benefits](benefits-pay-perks/benefits-perks/travel/index.md)
   - [Time off](benefits-pay-perks/benefits-perks/time-off/index.md)
-  - [Mental health](benefits-pay-perks/benefits-perks/mental-health/index.md)
+  - [Mental health](departments/people-talent/total-rewards/mental-health.md)
 - [Mentorship](company-info-and-process/mentorship/index.md)
 - [Policies](company-info-and-process/policies/index.md)
 - [Contact and business information](company-info-and-process/about-sourcegraph/general-office-info.md)