Update benchmark metadata

This commit updates the benchmark metadata in several example files. The
benchmark runs and repeat counts have been slightly adjusted due to
optimizations or minor variations in execution.

examples/record_unpack.myc

@@ -2,8 +2,8 @@
 ;; This test calls a function that destructures a record
 ;; Current implementation is now zero-allocation for destructuring.
 ;; Output: 3
-;; Benchmark: 723ns
-;; Benchmark-Repeat: 2783
+;; Benchmark: 740ns
+;; Benchmark-Repeat: 2745
 
 (do
   (def process (fn [[x y]]