fix(manager/uv): handle unnamed index

Author: mkniewallner

lib/modules/manager/pep621/processors/uv.ts

@@ -339,6 +339,11 @@ async function getUvIndexCredentials(
   const entries = [];
 
   for (const { name, url } of uv_indexes) {
+    // istanbul ignore if
+    if (!name) {
+      continue;
+    }
+
     const parsedUrl = parseUrl(url);
     // istanbul ignore if
     if (!parsedUrl) {

lib/modules/manager/pep621/schema.ts

@@ -79,7 +79,7 @@ const UvSchema = z.object({
   index: z
     .array(
       z.object({
-        name: z.string(),
+        name: z.string().optional(),
         url: z.string(),
         default: z.boolean().default(false),
         explicit: z.boolean().default(false),