build(deps): bump @diplodoc/html-extension from 2.9.3 to 2.9.6 (#1091)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Sergey Makhnatkin <makhnatkin@yandex-team.ru>

Author: dependabot[bot]

pnpm-lock.yaml

@@ -20,7 +20,7 @@ catalogs:
     '@diplodoc/cut-extension': ^1.1.0
     '@diplodoc/file-extension': ^0.2.1
     '@diplodoc/folding-headings-extension': ^0.1.2
-    '@diplodoc/html-extension': ^2.9.3
+    '@diplodoc/html-extension': ^2.9.6
     '@diplodoc/latex-extension': ^1.4.1
     '@diplodoc/mermaid-extension': ^2.0.0
     '@diplodoc/quote-link-extension': 0.1.3