Bump actions/download-artifact from 3 to 4

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v3...v4)

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

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

.github/workflows/arm-build.yaml

@@ -81,7 +81,7 @@ jobs:
       - uses: actions/checkout@v4
         name: Checkout Repository
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: arm-executables
           path: target/release/

.github/workflows/build.yml

@@ -119,12 +119,12 @@ jobs:
         with:
           path: wallet-checkout
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: wallet-webserver
           path: wallet-checkout/target/release/
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: wallet-cli
           path: wallet-checkout/target/release/
@@ -172,7 +172,7 @@ jobs:
         with:
           path: services-checkout
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: services-executables
           path: services-checkout/target/release/
@@ -216,7 +216,7 @@ jobs:
       - uses: actions/checkout@v4
         name: Checkout Repository
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: geth-data-dir
           path: scratch/geth-data-dir/