chore: use correct way to pass secrets to workflow call

.github/workflows/release-plz.yaml

@@ -2,15 +2,14 @@ name: Release-plz
 
 on:
   workflow_call:
-    inputs:
+    secrets:
       github_token:
-        type: string
         description: 'GitHub token'
         required: true
       cargo_registry_token:
-        type: string
         description: 'Cargo registry token'
         required: true
+    inputs:
       run_tests:
         type: boolean
         description: 'Run tests before release'
@@ -41,8 +40,8 @@ jobs:
         with:
           command: release
         env:
-          GITHUB_TOKEN: ${{ inputs.github_token }}
-          CARGO_REGISTRY_TOKEN: ${{ inputs.cargo_registry_token }}
+          GITHUB_TOKEN: ${{ secrets.github_token }}
+          CARGO_REGISTRY_TOKEN: ${{ secrets.cargo_registry_token }}
 
   # Create a PR with the new versions and changelog, preparing the next release.
   release-plz-pr:
@@ -65,5 +64,5 @@ jobs:
         with:
           command: release-pr
         env:
-          GITHUB_TOKEN: ${{ inputs.github_token }}
-          CARGO_REGISTRY_TOKEN: ${{ inputs.cargo_registry_token }}
+          GITHUB_TOKEN: ${{ secrets.github_token }}
+          CARGO_REGISTRY_TOKEN: ${{ secrets.cargo_registry_token }}