fix: update Go to 1.26.1 to fix stdlib vulnerabilities

Fixes GO-2026-4599, GO-2026-4600, GO-2026-4601, GO-2026-4602,
GO-2026-4603 (crypto/x509, net/url, os, html/template).

Signed-off-by: Sebastian Mendel <sebastian.mendel@netresearch.de>
Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>

Author: CybotTM

go.mod

@@ -1,6 +1,6 @@
 module github.com/netresearch/ofelia
 
-go 1.26.0
+go 1.26.1
 
 require (
 	github.com/armon/circbuf v0.0.0-20190214190532-5111143e8da2