Update workflow

Author: Heliozoa

.github/workflows/test.yml

@@ -73,7 +73,7 @@ jobs:
         if: matrix.os == 'ubuntu-latest'
         run: |
           Rscript -e 'install.packages(c("testthat", "jsonlite", "R.utils"))'
-          Rscript -e 'install.packages("plugins/r/tests/tmcRtestrunner", repos=NULL, type="source")'
+          Rscript -e 'install.packages("crates/plugins/r/tests/tmcRtestrunner", repos=NULL, type="source")'
 
       - name: Run tests
         run: cargo test --no-fail-fast