Fix rollup warning filter typo

Co-authored-by: Timothee Guerin <timothee.guerin@outlook.com>

packages/adl-vscode/rollup.config.js

@@ -16,7 +16,7 @@ export default {
     if (warning.code === "CIRCULAR_DEPENDENCY") {
       // filter out warnings about circular dependencies out of our control
       for (const each of ["node_modules/semver"]) {
-        if (warning.importer.indexOf(path.normalize(each) === 0)) {
+        if (warning.importer.includes(path.normalize(each))) {
           return;
         }
       }