Minor updates to feasibility study document

[omri374]

Pull Request Template

What are you trying to address

• Fixed a few markdown issues
• Updated the timeline to more common cases
• Updated the outcome section to explicitly mention that a feasibility study report is always produced, regardless of the outcome.

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This change is 

[github-actions[bot]]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	2		0	0.08s
⚠️ MARKDOWN	markdownlint	244		1	7.66s
⚠️ MARKDOWN	markdown-table-formatter	244		1	0.76s
✅ MDLINKCHECK	linkcheck	244		0	19.5s
✅ SPELL	cspell	255		0	16.81s
✅ YAML	prettier	10		0	0.9s
✅ YAML	yamllint	10		0	0.5s

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