chore: update go ver

Author: fumiama

.github/workflows/gomod2nix.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@master
         with:
-          go-version: "1.25"
+          go-version: "^1.26"
 
       - name: Check out code into the Go module directory
         uses: actions/checkout@master

.github/workflows/lib_build.yml

@@ -40,7 +40,7 @@ jobs:
       - name: Setup Go environment
         uses: actions/setup-go@master
         with:
-          go-version: '^1.25'
+          go-version: '^1.26'
 
       - name: Cache downloaded module
         uses: actions/cache@master

.github/workflows/lib_lint.yml

@@ -11,7 +11,7 @@ on:
       go-version:
         required: false
         type: string
-        default: '^1.25'
+        default: '^1.26'
       fetch-depth:
         required: false
         type: number

.github/workflows/lib_run.yml

@@ -8,7 +8,7 @@ on:
       go-version:
         required: false
         type: string
-        default: '^1.25'
+        default: '^1.26'
       fetch-depth:
         required: false
         type: number

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@master
         with:
-          go-version: '1.25'
+          go-version: '1.26'
 
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@master