Jetpack Dev Env: 1.0 release

[kraftbj]

Fixes #

Proposed changes:

• Sets the new Dev Env to version 1.0 (and provides an option for me to confirm the update notify feature is working)

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

Not yet, p2 forthcoming.

Does this pull request change what data or activity we track or use?

No.

Testing instructions:

• None needed. I'll ensure that the autotagging and publishing happens, but that's post-merge.

[github-actions]

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[tbradsha]

The version looks updated!