warnings for implicit references

[lunebellec]

I'm getting a few warnings at build time:

⚠️  alliance_canada/resource_tracking.md:3 Linking "using-the-metrix-portal" to an implicit heading reference, best practice is to create an explicit reference.
   Explicit references do not break when you update the title to a section, they are preferred over using the implicit HTML ID created for headers.
⚠️  alliance_canada/resource_tracking.md:3 Linking "tracking-resource-usage-at-an-account-level" to an implicit heading reference, best practice is to create an explicit reference.
   Explicit references do not break when you update the title to a section, they are preferred over using the implicit HTML ID created for headers.
⚠️  alliance_canada/resource_tracking.md:3 Linking "requesting-resources" to an implicit heading reference, best practice is to create an explicit reference.
   Explicit references do not break when you update the title to a section, they are preferred over using the implicit HTML ID created for headers.