Use actions/setup-node v2

Since actions/setup-node v2 has been declared stable since v2.1.4
(released on 2020-12-16), it should be safe to move everyone to v2.

.github/workflows/sync_ghes.yaml

@@ -14,7 +14,7 @@ jobs:
         git fetch --no-tags --prune --depth=1 origin +refs/heads/*:refs/remotes/origin/*
         git config user.email "cschleiden@github.com"
         git config user.name "GitHub Actions"
-    - uses: actions/setup-node@v1
+    - uses: actions/setup-node@v2
       with:
         node-version: '12'
     - name: Check starter workflows for GHES compat

.github/workflows/validate-data.yaml

@@ -10,7 +10,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
         with:
           node-version: "12"