docs: replace publish for deploy in docs

[NachoVazquez]

PR Checklist

Please check if your PR fulfills the following requirements:

• [x] The commit message follows our guidelines: CONTRIBUTING.md#commit
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[x] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

We generate the deploy command using the deploy keyword but the docs refer to publish

Fixes: #38

What is the new behavior?

We replace all mention of publish in favor of deploy

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

• publish is still an alias of deploy but for wrangler publish is deprecated

[cloudflare-pages[bot]]

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