Load the landing page and confirm the browser tab uses the square company mark, not the full wordmark
Confirm logo.png is unchanged (still available for in-page branding)
## Summary
- Copy company_site square `favicon.png` (gear/infinity mark) into `site/core/static/core/img/`
- Point `<link rel="icon">` at it instead of the wide wordmark `logo.png`
Closes #9
## Test plan
- [ ] Load the landing page and confirm the browser tab uses the square company mark, not the full wordmark
- [ ] Confirm `logo.png` is unchanged (still available for in-page branding)
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Summary
favicon.png(gear/infinity mark) intosite/core/static/core/img/<link rel="icon">at it instead of the wide wordmarklogo.pngCloses #9
Test plan
logo.pngis unchanged (still available for in-page branding)