Should be 's' on the end of the "extension" in the docs

[M-L-Ml]

seems there should be 's' on the end of the "extension" in the docs , quote "Note that setting worktree.useRelativePaths to "true" implies enabling the extension.relativeWorktrees config (see git-config[1]), thus making it incompatible with older versions of Git"

git/Documentation/config/worktree.adoc

Line 18 in cb3b403

`extension.relativeWorktrees` config (see linkgit:git-config[1]),