Rename Development.md to DEVELOPMENT.md to match the rest of README files

[Jovonni]

Simple typo fix, Development.md vs DEVELOPMENT.md to match all of the other readme files, or was Development.md used on purpose?

cool project so far 🚀

• [ ] This change is worth documenting at https://docs.all-hands.dev/
• [ ] Include this change in the Release Notes. If checked, you must provide an end-user friendly description for your change below

End-user friendly description of the problem this fixes or functionality this introduces.

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Summarize what the PR does, explaining any non-trivial design decisions.

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Link of any specific issues this addresses:

[Jovonni]

FYI: may or may not need to sync docs to include this. For example: https://docs.all-hands.dev/usage/llms/local-llms

[yoavf]

@Jovonni you should probably update the reference to Development.md everywhere it's referenced (including README.md, CONTRIBUTING.md): https://github.com/search?q=repo%3AAll-Hands-AI%2FOpenHands%20Development.md&type=code

[Jovonni]

done @yoavf 🫡

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