Update Library/Homebrew/extend/os/linux/hardware/cpu.rb

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: SMillerDev

Library/Homebrew/extend/os/linux/hardware/cpu.rb

@@ -24,8 +24,8 @@ def optimization_flags
           sig { returns(Symbol) }
           def family
             if arm?
-              implementer = cpuinfo[/^cpu implementer\s*: ([a-z0-9]*)$/, 1].to_i
-              cpu_model = cpuinfo[/^cpu part\s*: ([a-z0-9]*)$/, 1].to_i
+              implementer = cpuinfo[/^CPU implementer\s*: (0x\h+)$/i, 1].to_s.hex
+              cpu_model = cpuinfo[/^CPU part\s*: (0x\h+)$/i, 1].to_s.hex
 
               arm_family(implementer, cpu_model)
             elsif intel?