Fix eslint config path

Building all targets (`bazelisk build //plugins/code-owners/...`)
failed, because the `plugin_eslint()` rule expected `eslint.config.js`
instead of `.eslintrc.js`.

Change-Id: I3d23fa81b4d58b82e059e8861886dd67cf1736bf

web/eslint.config.js

diff --git a/web/.eslintrc.js b/web/eslint.config.js
similarity index 79%
rename from web/.eslintrc.js
rename to web/eslint.config.js
index 2144c1c..2ccadb7 100644
--- a/web/.eslintrc.js
+++ b/web/eslint.config.js
@@ -5,5 +5,5 @@
  */
 __plugindir = "code-owners/web";
 module.exports = {
-  extends: "../../.eslintrc.js",
+  extends: "../../eslint.config.js",
 };