Tweak the cargo workflow a bit more

- Run using the `debian-latest` image
- Use local `actions/checkout` where possible
- Small reordering

.gitea/workflows/cargo.yml

@@ -1,14 +1,14 @@
 name: "Check, Test and Lint Using Cargo"
 
 on:
-  - workflow_dispatch
   - push
   - pull_request
+  - workflow_dispatch
 
 jobs:
   check:
     name: Check
-    runs-on: ubuntu-latest
+    runs-on: debian-latest
     steps:
       - name: Checkout sources
         uses: actions/checkout@v3
@@ -27,10 +27,10 @@ jobs:
 
   test:
     name: Test Suite
-    runs-on: ubuntu-latest
+    runs-on: debian-latest
     steps:
       - name: Checkout sources
-        uses: https://github.com/actions/checkout@v3
+        uses: actions/checkout@v3
 
       - name: Install stable toolchain
         uses: https://github.com/actions-rs/toolchain@v1
@@ -47,7 +47,7 @@ jobs:
 
   lints:
     name: Lints
-    runs-on: ubuntu-latest
+    runs-on: debian-latest
     steps:
       - name: Checkout sources
         uses: actions/checkout@v3