gha/e2e: Switch to rc and 29 latest

Signed-off-by: Paweł Gronowski <[email protected]>

Author: vvoland

.github/workflows/e2e.yml

@@ -37,9 +37,9 @@ jobs:
           - alpine
           - debian
         engine-version:
-          - 29-rc  # latest rc
-          - 28  # latest
-          - 27  # latest - 1
+          - rc  # latest rc
+          - 29  # latest
+          - 28  # latest - 1
           - 25  # mirantis lts
     steps:
       -