Update dependency go to v1.25.8 (forgejo) (#11521)

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/11521
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: Renovate Bot <bot@kriese.eu>
Co-committed-by: Renovate Bot <bot@kriese.eu>

Author: viceice-bot

go.mod

@@ -2,7 +2,7 @@ module forgejo.org
 
 go 1.25.0
 
-toolchain go1.25.7
+toolchain go1.25.8
 
 require (
 	code.forgejo.org/f3/gof3/v3 v3.11.15