fixes a typecheck failure in test/units/comments-outside-html-test.ts;
updates the readme to add the --allow-net flag to the wasm.test.ts test command, since that is needed to do dynamic import of all unit tests;
updates the CI workflow to use the same command as the readme, since the previous command seemed to also run some (but not all) WPT tests as if they were Deno test files.
This PR:
test/units/comments-outside-html-test.ts;--allow-netflag to thewasm.test.tstest command, since that is needed to do dynamic import of all unit tests;