bump go version to 1.26.x

Author: Niklas Burchhardt

.github/workflows/main.yml

@@ -1,4 +1,3 @@
----
 # based on https://github.com/mvdan/github-actions-golang
 name: CI
 
@@ -18,7 +17,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.25.x]
+        go-version: [1.26.x]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}