Revert "ci: Update Go to 1.20"

This reverts commit 61767ff.

Author: TwiN

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v4
         with:
-          go-version: 1.20
+          go-version: 1.19
       - uses: actions/checkout@v3
       - run: go build
       - run: go test ./... -cover