Update DeterminateSystems/flake-checker-action to v13 (#49)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Tanner Doshier <git@doshitan.com>

Author: renovate[bot]

.github/workflows/ci-nix-template.yml

@@ -38,7 +38,7 @@ jobs:
         with:
           persist-credentials: false
       - uses: ./.github/actions/setup-nix
-      - uses: DeterminateSystems/flake-checker-action@a0f068d37b542f3150564fbf1164fec2d958ee11 # main
+      - uses: DeterminateSystems/flake-checker-action@de924abd783455e8429c858962b9e43062d19da1 # v13
 
       - name: Run lint
         run: nix develop --command bash -c "make check-static"