Fix GetRandomSide always returning left

GetRandomSide uses `RandomBool` to branch, but in the else block it returns `entry.lhs` again instead of `entry.rhs`. This causes it to completely blind the fuzzer to constants found on the right-hand-side of comparisons. Fix it to correctly use `rhs` when returning the other side.

PiperOrigin-RevId: 889588583

fuzztest/internal/table_of_recent_compares.h

diff --git a/fuzztest/internal/table_of_recent_compares.h b/fuzztest/internal/table_of_recent_compares.h
index 742bf55..2f61289 100644
--- a/fuzztest/internal/table_of_recent_compares.h
+++ b/fuzztest/internal/table_of_recent_compares.h
@@ -196,7 +196,7 @@
         result = val;
       }
     } else {
-      ValueType val = static_cast<ValueType>(entry.lhs);
+      ValueType val = static_cast<ValueType>(entry.rhs);
       if (min <= val && val <= max) {
         result = val;
       }