Update Node version used in update-solc workflow (#47)

Author: heap-coder

.github/workflows/update-solc.yml

@@ -14,7 +14,7 @@ jobs:
         fetch-depth: 0
     - uses: actions/setup-node@v3
       with:
-        node-version: 18.x
+        node-version: 22.x
         cache: npm
     - run: |
         set -euo pipefail