Switch to CircleCI's Rust + Node container image

This should make the `checkout` work on the runner host.

.forgejo/setup-trunk/action.yaml

@@ -11,4 +11,4 @@ runs:
   steps:
     - run: rustup target add wasm32-unknown-unknown
     - run: curl --output - --proto '=https' --tlsv1.2 --retry 10 --retry-connrefused --location --silent --show-error --fail 'https://github.com/trunk-rs/trunk/releases/download/v0.21.12/trunk-x86_64-unknown-linux-gnu.tar.gz' | tar --gunzip --extract --file -
-      working-directory: /usr/local/cargo/bin
+      working-directory: /home/circleci/.cargo/bin

.forgejo/workflows/continuous-integration.yaml

@@ -7,7 +7,7 @@ jobs:
   build:
     runs-on: docker
     container:
-      image: rust:1.85-bookworm
+      image: cimg/rust:1.85-node
     defaults:
       run:
         working-directory: app-proto
@@ -21,7 +21,7 @@ jobs:
   test:
     runs-on: docker
     container:
-      image: rust:1.85-bookworm
+      image: cimg/rust:1.85-node
     defaults:
       run:
         working-directory: app-proto
@@ -38,7 +38,7 @@ jobs:
   run-examples:
     runs-on: docker
     container:
-      image: rust:1.85-bookworm
+      image: cimg/rust:1.85-node
     defaults:
       run:
         working-directory: app-proto