chore: bump moc/core, use --default-persistent-actors, pin recipe fix branch

- moc 1.5.1 → 1.8.2, core 2.4.0 → 2.5.0
- Add --default-persistent-actors to moc args so the persistent keyword
  is no longer needed in main.mo
- Pin Motoko recipe to fix/motoko-mops-moc-args branch until
  dfinity/icp-cli-recipes#26 merges and a stable release is cut

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: marc0olo

motoko/who_am_i/icp.yaml

@@ -6,7 +6,7 @@ networks:
 canisters:
   - name: backend
     recipe:
-      type: "@dfinity/motoko@v4.1.0"
+      type: https://raw.githubusercontent.com/dfinity/icp-cli-recipes/refs/heads/fix/motoko-mops-moc-args/recipes/motoko/recipe.hbs
       configuration:
         main: src/backend/main.mo
         candid: src/backend/backend.did

motoko/who_am_i/mops.toml

@@ -1,11 +1,11 @@
 [toolchain]
-moc = "1.5.1"
+moc = "1.8.2"
 
 [dependencies]
-core = "2.4.0"
+core = "2.5.0"
 
 [moc]
 # M0236: use context dot notation (e.g. x.toText() instead of Nat.toText(x))
 # M0237: redundant explicit implicit arguments (e.g. Nat.compare is inferred automatically)
 # M0223: redundant type instantiation (e.g. Array.tabulate instead of Array.tabulate<T>)
-args = ["-W=M0236,M0237,M0223"]
+args = ["--default-persistent-actors", "-W=M0236,M0237,M0223"]

motoko/who_am_i/src/backend/main.mo

@@ -1,6 +1,6 @@
 import Principal "mo:core/Principal";
 
-persistent actor Whoami {
+actor Whoami {
   public query (message) func whoami() : async Principal {
     message.caller;
   };