404 fixes

[peterrowland]

Changes proposed in this pull request:

Removing or updating various 404 links that were scanned on the guides.

Accessibility:

• Remove link to chrome developer-accessibility-tools: This is now incorporated into chrome DevTools and the GH repository is archived.

Brand:

• Remove link but keep attribution for flag image

Content:

• resources.md: remove USA.gov bilingual style guide, which was taken down in 2023 and not yet put back up (slack thread

Derisking:

• Various updates to FAR links to match new url format on acquisition.gov
• OMB FY19 budget guidance url updated to point at legacy archived site

Engineering

• Removed bullet and link about workaround for scoping previously published packages because it appears to be fixed.
• Update link to shrinkwap.json docs
• Update security incidents reference to TTS handbook page referenced on the archived GitHub link
• Update reference to dependabot documentation
• Updated link to Cloud.gov security compliance page
• Removed reference to TTS-tech-portfolio ATO checklist issue template (repo no longer exists)
• updated link and references to federalist to Cloud.gov Pages
• updated KSS reference to github, because nothing is on the site
• updated link to MS powershell CLI docs
• remove dead link to Microsoft Edge VMs

Methods

• Removed reference to broken link to PDF of Steve Portugal debrief document

Accessibility

• Updated Knowbility blog reference to WCAG 2.2

[adunkman]

Looks good to me! Thank you Peter!