refactor: update CI to use just and correct paths

Author: markkovari

.github/workflows/tests.yml

@@ -102,6 +102,7 @@ jobs:
         continue-on-error: true
       - name: Run Rust tests
         run: just test-project-rust ${{ matrix.project }}
+ ${{ matrix.project }}
         env:
           RUSTFLAGS: --cfg advent_of_code_ci
 
@@ -131,6 +132,7 @@ jobs:
             ${{ runner.os }}-go-cache-
       - name: Run Go tests
         run: just test-project-go ${{ matrix.project }}
+ ${{ matrix.project }}
 
   zig_tests:
     needs: detect_changes