cmd/worker: update golang version to 1.25.0 in Dockerfile

Change-Id: I48e9326d67615115f5462337b728f28807896646
Reviewed-on: https://go-review.googlesource.com/c/pkgsite-metrics/+/697755
LUCI-TryBot-Result: Go LUCI <[email protected]>
Auto-Submit: Ethan Lee <[email protected]>
Reviewed-by: Neal Patel <[email protected]>

Author: ethanalee-work

cmd/worker/Dockerfile

@@ -13,7 +13,7 @@
 # installed here will be shadowed.
 
 
-FROM golang:1.23.0
+FROM golang:1.25.0
 
 LABEL maintainer="Go Ecosystem Team <[email protected]>"