[ops] update github ci with go 1.18.4 (#4247)

Co-authored-by: Nita Neou (Soph) <soph@harmony.one>

.github/workflows/ci.yaml

@@ -50,10 +50,10 @@ jobs:
           gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
           passphrase: ${{ secrets.GPG_PRIVATE_KEY_PASS }}
 
-      - name: Set up Go 1.14
+      - name: Set up Go 1.18
         uses: actions/setup-go@v2
         with:
-          go-version: 1.14.14
+          go-version: 1.18.4
 
       - name: Checkout dependence repo
         uses: actions/checkout@v2