Fix missing coverage files in CI

.forgejo/workflows/check.yaml

@@ -9,7 +9,7 @@ jobs:
         run: apt install --no-install-recommends --update -y nodejs just
       - name: setup toolchain
         run: |
-          rustup component add rustfmt clippy
+          rustup component add rustfmt clippy llvm-tools-preview
           cargo install cargo-llvm-cov --locked
 
       - name: checkout code

.justfile

@@ -89,7 +89,7 @@ alias v := verify
 
 # Assess coverage
 [group: 'assess']
-cover-assess:
+cover-assess: cover
     {{ cover_cmd }} --fail-under-regions 90 report
 
 # Assess formatting