Make some sites use latest version on main environment

Reference the new anchor for CMS School and Silkeborg as requested by
the business.

Reference the new anchor on staging to ensure that this follows the
latest version. This makes sense to enable testing there.

infrastructure/environments/dplplat01/sites.yaml

@@ -33,14 +33,14 @@ sites:
     description: "A site to test new releases on"
     deploy_key: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBLUrrxfwsfwz4nkn/WCbMUbLHkTFvyYB2uusHLA7NlH
     plan: webmaster
-    <<: *webmaster-release-image-source
+    <<: *webmaster-with-defaults-release-image-source
   cms-school:
     name: "CMS-skole"
     description: "Et site til undervisning i CMSet"
     importTranslationsCron: "0 * * * *"
     deploy_key: "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ6SzfPFf/XeLeqI342kxuJAlATpDMtgAfqlrLTTbW2m"
     plan: webmaster
-    <<: *webmaster-release-image-source
+    <<: *webmaster-with-defaults-release-image-source
   bibliotek-test:
     name: "Bibliotekstest"
     description: "Et site hvor bibliotekerne kan teste"
@@ -702,7 +702,7 @@ sites:
       - www.silkeborgbib.dk
     autogenerateRoutes: true
     plan: webmaster
-    <<: *webmaster-release-image-source
+    <<: *webmaster-with-defaults-release-image-source
   skanderborg:
     name: "Skanderborg Bibliotek"
     description: "The library site for Skanderborg"