Fix indentation on new.html.erb

[lanefoxwood]

I believe the task was to set the indentation to 2 spaces throughout the document. I attempted to do this...and after combing the whole doc, I could only see about 20ish lines that needed changing. I hope that these changes are accurate. Thank you for reviewing!

Fixes #11077 original issue, comment

screenshot of proposed changes:

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[ghost]

@publiclab/reviewers thank you for stepping in to help!

[github-actions[bot]]

This pull request generated screenshots of many common pages in the running app. You should be able to download and view them here: https://github.com/publiclab/plots2/suites/8267797390/artifacts/361842876

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This pull request generated screenshots of many common pages in the running app. You should be able to download and view them here: https://github.com/publiclab/plots2/suites/8295305072/artifacts/363756573

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Code Climate has analyzed commit 73b2a5a7 and detected 0 issues on this pull request.

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[github-actions[bot]]

This pull request generated screenshots of many common pages in the running app. You should be able to download and view them here: https://github.com/publiclab/plots2/suites/8295880170/artifacts/363790706

[TildaDares]

Resolved in #11133

[TildaDares]

Thank you for working on this @lanefoxwood!