Merge pull request #12486 from webknjaz/maintenance/rm-legacy-backport-gha-workflow

🔥 Exterminate legacy backport GHA workflow

Author: RonnyPfannschmidt

.github/workflows/backport.yml

@@ -392,6 +392,7 @@ Stefano Taschini
 Steffen Allner
 Stephan Obermann
 Sven-Hendrik Haase
+Sviatoslav Sydorenko
 Sylvain Marié
 Tadek Teleżyński
 Takafumi Arakaki