Bump actions/cache from 2 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 2 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v2...v4)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/crds-verify-kind.yaml

@@ -19,7 +19,7 @@ jobs:
       # Look for a CLI that's made for this PR
       - name: Fetch built CLI
         id: cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-velero-cli
         with:
@@ -31,7 +31,7 @@ jobs:
             velero-${{ github.event.pull_request.number }}-
 
       - name: Fetch cached go modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         if: steps.cache.outputs.cache-hit != 'true'
         with:
           path: ~/go/pkg/mod
@@ -69,7 +69,7 @@ jobs:
     steps:
       - name: Fetch built CLI
         id: cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         env:
           cache-name: cache-velero-cli
         with:

.github/workflows/e2e-test-kind.yaml

@@ -19,20 +19,20 @@ jobs:
       # Look for a CLI that's made for this PR
       - name: Fetch built CLI
         id: cli-cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ./_output/bin/linux/amd64/velero
           # The cache key a combination of the current PR number and the commit SHA
           key: velero-cli-${{ github.event.pull_request.number }}-${{ github.sha }}
       - name: Fetch built image
         id: image-cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ./velero.tar
           # The cache key a combination of the current PR number and the commit SHA
           key: velero-image-${{ github.event.pull_request.number }}-${{ github.sha }}
       - name: Fetch cached go modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         if: steps.cli-cache.outputs.cache-hit != 'true'
         with:
           path: ~/go/pkg/mod
@@ -95,13 +95,13 @@ jobs:
           image: "kindest/node:v${{ matrix.k8s }}"
       - name: Fetch built CLI
         id: cli-cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ./_output/bin/linux/amd64/velero
           key: velero-cli-${{ github.event.pull_request.number }}-${{ github.sha }}
       - name: Fetch built Image
         id: image-cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ./velero.tar
           key: velero-image-${{ github.event.pull_request.number }}-${{ github.sha }}
@@ -110,7 +110,7 @@ jobs:
           kind load image-archive velero.tar
       # always try to fetch the cached go modules as the e2e test needs it either
       - name: Fetch cached go modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/go/pkg/mod
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}

.github/workflows/pr-ci-check.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Check out the code
         uses: actions/checkout@v4
       - name: Fetch cached go modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/go/pkg/mod
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}