build: Upgrade to Node 20 (#1209)

* feat: updated node to v20

* refactor: updated package-lock along with ci & lockfile version workflows

* refactor: updated lockfile version workflow

.github/workflows/lockfileversion-check.yml

@@ -10,4 +10,4 @@ on:
 
 jobs:
   version-check:
-    uses: openedx/.github/.github/workflows/lockfile-check.yml@master
+    uses: openedx/.github/.github/workflows/lockfileversion-check-v3.yml@master

.github/workflows/validate.yml

@@ -12,7 +12,6 @@ jobs:
     strategy:
       matrix:
         node: [18, 20]
-    continue-on-error: ${{ matrix.node == 20 }}
 
     steps:
     - uses: actions/checkout@v4