fix(ci): allow retries for fetch test

Signed-off-by: Victor Adossi <vadossi@cosmonic.com>

Author: vados-cosmonic

test/builtins/fetch.js

@@ -1,8 +1,10 @@
 import { strictEqual, ok } from 'node:assert';
 
+const FETCH_URL = 'https://httpbin.org/anything';
+
 export const source = `
   export async function run () {
-    const res = await fetch('https://httpbin.org/anything');
+    const res = await fetch('${FETCH_URL}');
     const source = await res.json();
     console.log(source.url);
   }
@@ -14,7 +16,19 @@ export const source = `
 export const enableFeatures = ['http'];
 
 export async function test(run) {
-  const { stdout, stderr } = await run();
+  let retries = 3;
+  let stdout, stderr;
+  while (retries > 0) {
+    try {
+      const result = await run();
+      stdout = result.stdout;
+      stderr = result.stderr;
+      break;
+    } catch (err) {
+      console.error('failed to fetch URL', err);
+    }
+    retries -= 1;
+  }
   strictEqual(stderr, '');
-  strictEqual(stdout.trim(), 'https://httpbin.org/anything');
+  strictEqual(stdout.trim(), FETCH_URL);
 }