add new section and some tools

[Decuriosity]

User description

Hi, i believe that increasing conversions is something any startup needs, so I've added a new section and several tools.
All tools can be used for free (freemium)

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PR Type

Documentation

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Description

• Added a new section titled Web Experimentation.

• Listed four tools under the new section for experimentation.

• Tools include VWO, PostHog, OptimalUX, and Upflowy.

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Changes walkthrough 📝

	Relevant files
Documentation	README.md Introduced `Web Experimentation` section and tools              README.md Added a new section titled Web Experimentation. Listed four tools with links under the new section. +7/-0

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[qodo-merge-pro]

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⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Incorrect Link The PostHog link points to ProductHunt instead of the official PostHog website. This should be updated to https://posthog.com - PostHog - https://www.producthunt.com/

[qodo-merge-pro]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
General	✅ Fix incorrect external URL Suggestion Impact: Changed PostHog URL from ProductHunt to official PostHog website code diff: -- PostHog - https://www.producthunt.com/ +- PostHog - https://posthog.com/ The PostHog link points to ProductHunt instead of the official PostHog website. Update it to the correct URL. README.md [223] -- PostHog - https://www.producthunt.com/ +- PostHog - https://posthog.com/ [Suggestion has been applied] Suggestion importance[1-10]: 8 __ Why: The suggestion correctly identifies and fixes an incorrect URL that points to ProductHunt instead of PostHog's official website, which is important for user navigation and resource accuracy.	Medium
Update

[Decuriosity]

I thought about adding this section to Tech, but CRO is more about marketing after all