Update architecture diagrams with consistent naming and simplified labels

[vancura]

This PR updates both horizontal and vertical architecture diagrams to improve consistency and readability:

Changes

• Updated actor name from bob/screenshot to bob/screenshotter
• Changed domain from .apify.actor to .apify.com in URLs
• Simplified HTTP labels (removed "REQUEST AND RESPONSE" and "NOTIFICATION" suffixes)
• Removed redundant port :443 from Web server component
• Updated JSON property name from screenshotURL to screenshotUrl

Files changed

• horizontal-diagram.png
• vertical-diagram.png

Related

• Whitepaper copy updates: Update Actor naming conventions, URLs, and Diagram actor-whitepaper#65

Fixes #104

[jancurn]

Thanks Vaclav. The URL was supposed to be https://bob-screenshotter.apify.actor, sorry for the mistake. And please can the arrow to the web server be just unidirectional, to make it more clear?

And lastly, pls can we add the source code of the diagrams to the GitHub repo?