chore: fix yaml

Author: kmruiz

.github/workflows/code-health.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Run tests
         run: npm test
         env:
-          TEST_MDB_MCP_VOYAGE_API_KEY=${{ secrets.TEST_MDB_MCP_VOYAGE_API_KEY }}
+          TEST_MDB_MCP_VOYAGE_API_KEY: ${{ secrets.TEST_MDB_MCP_VOYAGE_API_KEY }}
       - name: Upload test results
         if: always() && matrix.os == 'ubuntu-latest'
         uses: actions/upload-artifact@v4