chore: add concurrency rule to workflows

[itsacoyote]

Description

Add concurrency rules to workflows for staging deploy workflows. This cancels any currently running workflow when a new workflow is set to run. For example when two PRs are merged to main around the same time, one will cancel out the other and only one workflow is run to deploy. This makes it so that we don't have a queue of build and deploys to run, cutting down time and resources.

Fix yaml formatting errors with github issue templates. They do not list in Create Issues if format is incorrect.

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 518b384):

https://zksync-sdk-docs-staging--pr32-concurrency-rule-xhbk67gm.web.app

_{(expires Tue, 11 Jun 2024 15:36:45 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: f6539d831ccfa61081c09db66b409eadb94db989}