chore(deps): update dependency go to v1.26.0

Author: renovate[bot]

.github/workflows/main.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v6
         with:
-          go-version: 1.25
+          go-version: 1.26
 
       # Runs a set of commands using the runners shell
       - name: Run GoReleaser

go.mod

@@ -12,7 +12,7 @@ module github.com/adobe/imscli
 
 go 1.23.0
 
-toolchain go1.25.6
+toolchain go1.26.0
 
 require (
 	github.com/adobe/ims-go v0.19.2