Bump go version to 1.25.8

Author: BarbUk

.github/workflows/ci.yml

@@ -44,7 +44,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
       with:
-        go-version: 1.21.0
+        go-version: 1.25.8
     - name: Set up Python
       uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
       with: