runtime: fix small leak in Blob deinit (#24802)

pulled out of https://github.com/oven-sh/bun/pull/21663

scripts/runner.node.mjs

@@ -494,7 +494,7 @@ async function runTests() {
     if (isBuildkite) {
       // Group flaky tests together, regardless of the title
       const context = flaky ? "flaky" : title;
-      const style = flaky || title.startsWith("vendor") ? "warning" : "error";
+      const style = flaky ? "warning" : "error";
       if (!flaky) attempt = 1; // no need to show the retries count on failures, we know it maxed out
 
       if (title.startsWith("vendor")) {

src/bun.js/webcore/Blob.zig

@@ -4772,6 +4772,7 @@ export fn Blob__ref(self: *Blob) void {
 export fn Blob__deref(self: *Blob) void {
     bun.assertf(self.isHeapAllocated(), "cannot deref: this Blob is not heap-allocated", .{});
     if (self.#ref_count.decrement() == .should_destroy) {
+        self.#ref_count.increment(); // deinit has its own isHeapAllocated() guard around bun.destroy(this), so this is needed to ensure that returns true.
         self.deinit();
     }
 }