Rename s8rng/s32rng -> i8rng/i32rng

PiperOrigin-RevId: 324746732
diff --git a/test/fully-connected-operator-tester.h b/test/fully-connected-operator-tester.h
index 64f9d39..648de5d 100644
--- a/test/fully-connected-operator-tester.h
+++ b/test/fully-connected-operator-tester.h
@@ -132,7 +132,7 @@
   void TestQU8() const {
     std::random_device random_device;
     auto rng = std::mt19937(random_device());
-    auto s32rng = std::bind(std::uniform_int_distribution<int32_t>(-10000, 10000), rng);
+    auto i32rng = std::bind(std::uniform_int_distribution<int32_t>(-10000, 10000), rng);
     auto u8rng = std::bind(std::uniform_int_distribution<uint32_t>(0, std::numeric_limits<uint8_t>::max()), rng);
 
     std::vector<uint8_t> input(XNN_EXTRA_BYTES / sizeof(uint8_t) +
@@ -149,7 +149,7 @@
     for (size_t iteration = 0; iteration < iterations(); iteration++) {
       std::generate(input.begin(), input.end(), std::ref(u8rng));
       std::generate(kernel.begin(), kernel.end(), std::ref(u8rng));
-      std::generate(bias.begin(), bias.end(), std::ref(s32rng));
+      std::generate(bias.begin(), bias.end(), std::ref(i32rng));
       std::fill(output.begin(), output.end(), 0xA5);
 
       // Compute reference results, without renormalization.