#10422: break down the install md into two differnt bash line

break down the bash line so it can copy the command step by step <!-- greptile_comment --> <h2>Greptile Overview</h2> <h3>Greptile Summary</h3> - Updates `README.md` to split a previously single multi-command bash snippet into two lines/steps to make copy/paste easier. - Change is documentation-only and does not affect application/runtime behavior. - No code-path or build/test impacts expected; primary risk is instructional accuracy of the installation commands. <h3>Confidence Score: 5/5</h3> - This PR is safe to merge with minimal risk. - Only documentation changes in README.md; no functional code changes or configuration changes were introduced, and the modification is straightforward. - README.md <!-- greptile_other_comments_section --> _{(2/5) Greptile learns from your feedback when you react with thumbs up/down!} **Context used:** - Context from `dashboard` - CLAUDE.md ([source](https://app.greptile.com/review/custom-context?memory=fd949e91-5c3a-4ab5-90a1-cbe184fd6ce8)) - Context from `dashboard` - AGENTS.md ([source](https://app.greptile.com/review/custom-context?memory=0d0c8278-ef8e-4d6c-ab21-f5527e322f13)) <!-- /greptile_comment -->