actions: Set node version (#5868)

Signed-off-by: Abhijat Malviya <[email protected]>

Author: abhijat

.github/workflows/mastodon-ruby-tests.yml

@@ -65,7 +65,7 @@ jobs:
           ruby-version: 3.4
           bundler-cache: true
       - name: Set up Node.js
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
       - name: Enable corepack

.nvmrc

@@ -0,0 +1 @@
+22.19