resolve the version mismatch and unknown directive errors

Author: ernest-phillips

.github/workflows/go.yml

@@ -13,10 +13,10 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - name: Set up Go 1.19
+      - name: Set up Go 1.23
         uses: actions/setup-go@v3
         with:
-          go-version: 1.19
+          go-version: 1.23
 
       - name: Check out code
         uses: actions/checkout@v3
@@ -36,4 +36,4 @@ jobs:
         run: go test -race ./...
 
       - name: Build
-        run: go build -v .
+        run: go build -v .

go.mod

@@ -1,8 +1,6 @@
 module github.com/github/gh-classroom
 
-go 1.23.0
-
-toolchain go1.24.5
+go 1.23
 
 require (
 	github.com/AlecAivazis/survey/v2 v2.3.6