release: update notification lists in the release process

.gitlab/issue_templates/new-release.md

@@ -95,7 +95,7 @@ git commit -m 'Update version number to @VERSION@@RC@' CMake/vtkVersion.cmake
         [discourse.vtk.org](https://discourse.vtk.org/).
 
 /cc @ben.boeckel
-/cc @ken-martin
-/cc @utkarsh.ayachit
+/cc @berkgeveci
+/cc @vbolea
 /milestone %"@VERSION@@RC@"
 /label ~"priority:required"

.kitware-release-paraview.json

@@ -5,7 +5,6 @@
     "maintainers": [
         "ben.boeckel",
         "cory.quammen",
-        "utkarsh.ayachit",
         "vbolea"
     ]
 }

.kitware-release.json

@@ -3,8 +3,7 @@
     "project": "vtk/vtk",
     "maintainers": [
         "ben.boeckel",
-        "ken-martin",
-        "utkarsh.ayachit",
+        "berkgeveci",
         "vbolea"
     ]
 }