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As stated by eta, updating checkout v2 to v4 and setup v2 to v5, changing version to be updated from go.mod

Co-authored-by: Eta <24918963+Eta0@users.noreply.github.com>

.github/workflows/TestGPT_BPE.yml

@@ -12,14 +12,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
-      - name: Set up Go 1.19
-        uses: actions/setup-go@v2
+      - name: Set up Go
+        uses: actions/setup-go@v5
         with:
-          go-version: 1.19
+          go-version-file: 'go.mod'
 
       - name: Build
         run: go build -v ./