Fix release note toc (#1293)

Someone mentioned a broken ToC on Discord

blog/2024-03-05-nushell_0_91_0.md

@@ -26,9 +26,9 @@ As part of this release, we also publish a set of optional plugins you can insta
 # Table of content
 
 - [_Themes of this release / New features_](#themes-of-this-release-new-features-toc)
- - [_Handling globs for variables_](#handling-globs-for-variables)
- - [_Plugin protocol overhaul_](#plugin-protocol-overhaul)
- - [_Stderr pipeling support_](#stderr-pipeling-support)
+ - [_Handling globs for variables_](#handling-globs-for-variables-toc)
+ - [_Plugin protocol overhaul_](#plugin-protocol-overhaul-toc)
+ - [_Stderr pipeling support_](#stderr-pipeling-support-toc)
  - [_REPL stability and panic recovery_](#repl-stability-and-panic-recovery-toc)
  - [_Hall of fame_](#hall-of-fame-toc)
  - [_Bug fixes_](#bug-fixes-toc)