ci: Add --incompatible upgrade

Author: tomasol

.github/workflows/scheduled-bump-cargo-lock.yml

@@ -16,6 +16,14 @@ permissions:
 jobs:
   bump-cargo-lock:
     runs-on: ubuntu-24.04
+    strategy:
+      fail-fast: false
+      matrix:
+        compatible:
+          - cmd: cargo upgrade
+        incompatible:
+          - cmd: cargo upgrade --incompatible
+
     steps:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
         with:
@@ -35,8 +43,7 @@ jobs:
 
       - name: Bump Cargo.lock, Cargo.toml
         run: |
-          nix develop --command cargo upgrade
-          nix develop --command cargo update
+          nix develop --command ${{ matrix.cmd }}
 
       - name: Configure Git
         run: |