Removed spurious backslash from troubleshoot-hot-spot-issues.md (#3283)
Removed spurious backslash from troubleshoot-hot-spot-issues.md (#3283)

Removed spurious backslash

Co-authored-by: ti-srebot <354121b1fcd840b60f1eb3b56f3ea5cc78ec06dd@users.noreply.github.com>
pingcap/docs,pingcap/docs,pingcap/docs