docs: clean up README, fix clone URL typo and add Telegram link

[janicegrech1-hash]

Small documentation improvements to README.md:

• Removed redundant duplicate intro sentence under Features
• Corrected typo in the git clone URL example
• Added official GoodBuilders Telegram link (https://t.me/gooddollarbounties) to the Features section for better visibility and easier onboarding for new contributors/bounty hunters

This helps people discover the community chat for questions, bounties, and discussions early.

Happy to adjust or add more if needed!

[sourcery-ai]

Hey - I've found 1 issue

Prompt for AI Agents

Please address the comments from this code review:

## Individual Comments

### Comment 1
<location> `README.md:3-4` </location>
<code_context>
 # GoodCollective

 ## Features
+This is the monorepo for GoodCollective (Segmented UBI and Direct Payments Pool)

-This is the repo for the GoodCollective protocol and dapp, use it to:
</code_context>

<issue_to_address>
**suggestion (typo):** Consider ending this introductory sentence with a period for consistency and correctness.

Because this line is a standalone introductory sentence, add a period at the end to improve grammar and align with typical punctuation.

```suggestion
## Features
This is the monorepo for GoodCollective (Segmented UBI and Direct Payments Pool).
```
</issue_to_address>

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