Stable release 2.92.8

[tomschr]

What's Changed

• Add missing # for footnote reference by @tomschr in Add missing # for footnote reference #579
• Process in book & article title pages by @tomschr in Process <revhistory> in book & article title pages #578
• Fix performance="optinal" not shown for substeps #517: Process substeps/@performance='optional' by @tomschr in Fix #517: Process substeps/@performance='optional' #580

Full Changelog: 2.92.7...2.92.8

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This discussion was created from the release Stable release 2.92.8.