fix(docs): Adding additional step for generating database schema in CONTRIBUTING.md

[Furbreeze]

When following the steps in CONTRIBUTING.md I ran into the following error:

[web] The table `public.UserToOrg` does not exist in the current database.
[web]     at <unknown> (src/initialize.ts:15:46)
[web]     at async pruneOldGuestUser (src/initialize.ts:15:23)
[web]     at async initSingleTenancy (src/initialize.ts:41:5)
[web]     at async (src/initialize.ts:103:9)
[web]   13 | const pruneOldGuestUser = async () => {
[web]   14 |     // The old guest user doesn't have the GUEST role
[web] > 15 |     const guestUser = await prisma.userToOrg.findUnique({
[web]      |                                              ^
[web]   16 |         where: {
[web]   17 |             orgId_userId: {
[web]   18 |                 orgId: SINGLE_TENANT_ORG_ID, {
[web]   code: 'P2021',
[web]   clientVersion: '6.2.1',
[web]   meta: [Object]
[web] }

Simple PR to add the following to CONTRIBUTING.md

6. Generate the database schema.
    ```sh
    yarn dev:prisma:migrate:dev
    ```

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on this repository.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}