Commit 2c86216b5b50a3519b07c8a8e664bc75b854cc04

Pierre Le Marre 2023-06-23T11:12:10

CI: Fix documentation generation for macOS - Force Doxygen version 1.9.6, because 1.9.7 breaks our doc cool URIs, i.e. our system that maintain stable doc pages via redirection. Associated issue in Doxygen: https://github.com/doxygen/doxygen/issues/10146 - Install graphviz to build the .dot files.