Update test.yml workflow for find-invalid-json.sh

.github/workflows/test.yml

@@ -13,5 +13,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+    - name: clone mkiocccentry
+      run: git clone https://github.com/ioccc-src/mkiocccentry
+    - name: install jparse
+      run: cd mkiocccentry && make all && cd jparse && sudo make all install
     - name: make test
       run: make test