docs: remove blank lines between bottom links

Author: moyaspace

README.md

@@ -128,9 +128,6 @@ npm publish                         # publish to npm
 ---
 
 **GitHub**: [moyaspace/openspec-superpowers-opencode](https://github.com/moyaspace/openspec-superpowers-opencode)
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 **npm**: [@moyaspace/openspec-superpowers-opencode](https://www.npmjs.com/package/@moyaspace/openspec-superpowers-opencode)
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 **Author**: rl <robincn@gmail.com>
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 **License**: MIT