Update documenation for the vitest coverage reporter

Author: leeyi45

lib/vitest-reporter/build.js

@@ -9,7 +9,7 @@ const command = getBuildCommand({
   entryPoints: ['./index.cts'],
   bundle: true,
   // @actions/core needs to be bundled because it might not be installed
-  // when coverage tests are being run for individual packages
+  // for coverage tests that are being run for individual packages
   external: ['istanbul-lib-report'],
   format: 'cjs',
   outfile: './dist.cjs',