[Upgrade] Go setup action to version 6 and update version

Author: JanGalek

action.yml

@@ -67,9 +67,9 @@ runs:
       shell: bash
 
     - name: Set up Go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
       with:
-        go-version: "1.23"
+        go-version: "1.26"
 
     - name: Build the Go binary
       run: |