Add mono-repo filtering example using a workflow matrix#1

nicolaswill wants to merge 8 commits intoadvanced-security:mainadvanced-security/monorepo-filtering-workaround:mainfrom

kraiouchkine-ghas:kraiouchkine-patch-1kraiouchkine-ghas/monorepo-filtering-workaround:kraiouchkine-patch-1Copy head branch name to clipboard