pkgdown 2.0.7

• Fix topic match selection when there is an unmatched selection followed by a matched selection (@bundfussr, #2234)
• Fix highlighting of nested not R code blocks (for instance, example of R
  Markdown code with chunks) (@idavydov, #2237).
• Tweak German translation (@krlmlr, @mgirlich, @lhdjung, #2149, #2236)
• Remove mention of (defunct) Twitter card validator, provide alternatives (@Bisaloo, #2185)
• Fix keywords typo in check_missing_topics() message (@swsoyee, #2178).
• Use jsdeliver CDN for bootstrap-toc (@GregorDeCillia, #2207).