Update dependency go to v1.26.1 (#1048)

| datasource     | package | from   | to     |
| -------------- | ------- | ------ | ------ |
| golang-version | go      | 1.26.0 | 1.26.1 |

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

example/go/otel/go.mod

@@ -2,7 +2,7 @@ module github.com/opentracing-contrib/nginx-opentracing/example/go/otel
 
 go 1.24.0
 
-toolchain go1.26.0
+toolchain go1.26.1
 
 require (
 	github.com/pkg/errors v0.9.1