bump GHA go versions to 1.26

Author: pashagolub

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Set up Golang
       uses: actions/setup-go@v6
       with:
-        go-version: '1.23' 
+        go-version: '1.26' 
 
     - name: Install etcd
       if: runner.os == 'Linux'

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
     - name: Set up Golang
       uses: actions/setup-go@v6
       with:
-        go-version: '1.23'
+        go-version: '1.26'
 
     - name: Check out code into the Go module directory
       uses: actions/checkout@v4