Update assignees for automatic github issues (#5705)

Nightlies had problems creating issues on fail because of the assignees.

---
TYPE: NO_HISTORY
DESC: Update assignees for automatic github issues

Author: ypatia

.github/workflows/nightly-dockerfile.yml

@@ -38,4 +38,4 @@ jobs:
         with:
           name: Nightly Dev Build
           label: CI,nightly
-          assignee: dudoslav
+          assignee: ihnorton,ypatia,teo-tsirpanis

.github/workflows/nightly-test.yml

@@ -162,4 +162,4 @@ jobs:
         with:
           name: nightly GitHub Actions build
           label: nightly
-          assignee: davisp,dudoslav,ihnorton,teo-tsirpanis
+          assignee: ihnorton,ypatia,teo-tsirpanis

.github/workflows/release.yml

@@ -133,4 +133,4 @@ jobs:
         with:
           name: Release failed
           label: release
-          assignee: davisp,dudoslav,ihnorton,teo-tsirpanis
+          assignee: ihnorton,ypatia,teo-tsirpanis