Merge pull request #1846 from freedomofpress/dependabot/github_action…

…s/actions/cache-4

Bump actions/cache from 2 to 4

.github/workflows/cargo-vet.yml

@@ -14,7 +14,7 @@ jobs:
       CARGO_VET_VERSION: 0.9.0
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/cache@v2
+    - uses: actions/cache@v4
       id: cache-vet
       with:
         path: /usr/local/cargo/bin/cargo-vet