One more action to migrate

https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/

Author: mostlyobvious

Diff for: .github/workflows/ruby_event_store-browser_assets.yml

@@ -20,7 +20,7 @@ jobs:
         node-version: 20
         cache: npm
         cache-dependency-path: "${{ env.WORKING_DIRECTORY }}/elm/package-lock.json"
-    - uses: actions/cache@v3
+    - uses: actions/cache@v4
       with:
         path: "~/.elm"
         key: elm-${{ hashFiles(format('{0}/elm/elm.json', env.WORKING_DIRECTORY)) }}

Diff for: .github/workflows/ruby_event_store-browser_test.yml

@@ -69,7 +69,7 @@ jobs:
         node-version: 20
         cache: npm
         cache-dependency-path: "${{ env.WORKING_DIRECTORY }}/elm/package-lock.json"
-    - uses: actions/cache@v3
+    - uses: actions/cache@v4
       with:
         path: "~/.elm"
         key: elm-${{ hashFiles(format('{0}/elm/elm.json', env.WORKING_DIRECTORY)) }}

Diff for: support/ci/generate

@@ -358,7 +358,7 @@ class CI
 
     def cache_elm
       {
-        "uses" => "actions/cache@v3",
+        "uses" => "actions/cache@v4",
         "with" => {
           "path" => "~/.elm",
           "key" =>