CI: Update release jobs to use go1.25.8 and go1.26.1

Author: beautifulentropy

.github/workflows/release.yml

@@ -35,7 +35,8 @@ jobs:
       fail-fast: false
       matrix:
         GO_VERSION:
-          - "1.25.5"
+          - "1.25.8"
+          - "1.26.1"
     runs-on: ubuntu-24.04
     permissions:
       contents: write

.github/workflows/try-release.yml

@@ -20,7 +20,8 @@ jobs:
       fail-fast: false
       matrix:
         GO_VERSION:
-          - "1.25.5"
+          - "1.25.8"
+          - "1.26.1"
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v6