Fill in new clientAssemblies list on resource manifest (#17100)

Resources/manifest.yml

@@ -2,4 +2,9 @@
 windowIconSet: /Textures/Logo/icon
 splashLogo: /Textures/Logo/logo.png
 
+clientAssemblies:
+  - Content.Client
+  - Content.Shared
+  - Content.Shared.Database
+
 # PJB PLEASE

Tools/package_client_build.py

@@ -44,6 +44,7 @@ CLIENT_IGNORED_RESOURCES = {
 }
 
 CLIENT_CONTENT_ASSEMBLIES = [
+    # IF YOU ADD SOMETHING HERE, ADD IT TO MANIFEST.YML TOO.
     "Content.Client",
     "Content.Shared",
     "Content.Shared.Database"