build(deps): bump actions/checkout from 3 to 4 (#65)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -29,7 +29,7 @@ jobs:
       RUSTV: ${{ matrix.rust }}
       TARGET: ${{ matrix.rust-target }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install Rust stable
         uses: actions-rs/toolchain@v1
         with:
@@ -67,7 +67,7 @@ jobs:
     env:
       RUST_BACKTRACE: full
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Install musl-tools
         run: |
           set -ex

.github/workflows/e2e_cloud.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout Source Code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Fluvio CLI
         run: |