chore(deps): update dependency go to 1.26

Author: renovate[bot]

.github/workflows/testing.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v6
         with:
-          go-version: "1.25"
+          go-version: "1.26"
 
       - name: Download dependencies
         run: go mod download