[ELF][test] Fix compressed-debug-level.test with zlib-ng

The test is brittle but it seems unnecessary to remove size check now.

Close #56222

(cherry picked from commit 876af56)

Author: MaskRay

lld/test/ELF/compressed-debug-level.test

@@ -20,7 +20,7 @@
 ## Here we check how -O flag affects the size of compressed sections produced.
 
 # HEADER: [Nr] Name        Type     Address  Off    Size
-# LEVEL1: [ 1] .debug_info PROGBITS 00000000 000094 00001c
+# LEVEL1: [ 1] .debug_info PROGBITS 00000000 000094 00001{{[bc]}}
 # LEVEL6: [ 1] .debug_info PROGBITS 00000000 000094 00001a
 
 ## A little arbitrary debug section which has a different size after