Add badge for mcp-customs to README.md

[mcpcustoms]

Ran your server through mcp-customs (https://github.com/mcpcustoms/mcp-customs), a free offline scanner I built that checks MCP servers for common security risks before install. It came back clean — 94/100.

Wrote up the full methodology (and where the tool got things wrong on other servers) here: https://dev.to/mcpcustoms/we-scanned-12-popular-mcp-servers-the-most-interesting-finding-was-our-own-false-positives-kcf

Adding the badge is obviously optional — totally fine to close this if you'd rather not, no hard feelings either way.

[gemini-code-assist]

Code Review

This pull request adds a new mcp-customs badge to the README.md file. The reviewer suggested placing the new badge inline with the existing badges to maintain a consistent layout and prevent visual misalignment caused by rendering it on a separate line.

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[gemini-code-assist]

To maintain a consistent layout and prevent the new badge from rendering on a separate line above the others, it should be grouped inline with the existing badges on the same line. Putting it on its own line breaks the visual alignment of the badge section.