fix(bug-zoo): determinism species harness targets go 1.22 not 1.23

The BZ-DETERMINISM-001 go harnesses (lab/exhibit/fixed) declared
`go 1.23`, but CI runs go 1.22.12 with GOTOOLCHAIN=local, so the
species hostCheck (`go test ./...`) failed with
'go.mod requires go >= 1.23' and tanked all_specimens_pass on main.
The harness is trivial int arithmetic with no >=1.23 features; 1.22
matches the baseline the repo's 8 other go.mod files already use.
Verified: lab harness passes under GOTOOLCHAIN=local at go 1.22, and
the full bug-zoo smoke (all 5 specimens) is green locally.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: TSavo

menagerie/bug-zoo/species/BZ-DETERMINISM-001-canonical-byte-order/go/exhibit/map-serializer/harness/go.mod

@@ -1,2 +1,2 @@
 module bzdeterminism/exhibit
-go 1.23
+go 1.22

menagerie/bug-zoo/species/BZ-DETERMINISM-001-canonical-byte-order/go/fixed/map-serializer/harness/go.mod

@@ -1,2 +1,2 @@
 module bzdeterminism/fixed
-go 1.23
+go 1.22

menagerie/bug-zoo/species/BZ-DETERMINISM-001-canonical-byte-order/go/lab/harness/go.mod

@@ -1,2 +1,2 @@
 module bzdeterminism/lab
-go 1.23
+go 1.22