Fix broken Go wiki link in README

[Copilot]

Summary

Updates the broken Go wiki URL in README.md to point to the current official location.

Changes

The Go project has migrated their wiki from GitHub to go.dev. This PR updates the link in the "Don't +1 an issue" section of the README from:

• https://github.com/golang/go/wiki/NoPlusOne (broken)

to:

• https://go.dev/wiki/NoPlusOne (working)

Context

The old URL no longer resolves correctly, which could confuse contributors trying to understand our issue commenting guidelines. The new go.dev domain is the official home for Go documentation and wiki content.

Fixes the issue reported where clicking the NoPlusOne link leads to a broken page.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Broken link in docs</issue_title>
<issue_description>### Is there an existing issue for this?

• I have searched the existing issues

Package ecosystem

n/a

Package manager version

No response

Language version

No response

Manifest location and content before the Dependabot update

No response

dependabot.yml content

No response

Updated dependency

No response

What you expected to see, versus what you actually saw

currently: click on https://github.com/golang/go/wiki/NoPlusOne link and it doesnt go to correct page

Native package manager behavior

No response

Images of the diff or a link to the PR, issue, or logs

No response

Smallest manifest that reproduces the issue

No response</issue_description>

<agent_instructions>The new url is https://go.dev/wiki/NoPlusOne</agent_instructions>

Comments on the Issue (you are @copilot in this section)

Fixes #13342

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