[skip ci] Bump actions/download-artifact from 2 to 4.1.7 in /.github/…

…workflows (#7)

* Bump actions/download-artifact from 2 to 4.1.7 in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

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

* Set Ubuntu 20.04

* Update Actions versions

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: José Ignacio Escribano <jiep@users.noreply.github.com>

.github/workflows/build.yml

@@ -10,12 +10,12 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
 
     - name: Set up Git repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Install dependencies
       run: sudo apt-get install -y cmake make openssl
@@ -24,7 +24,7 @@ jobs:
       run: bash ./build.sh
 
     - name: Archive binaries
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: binaries
         path: |
@@ -40,13 +40,13 @@ jobs:
     steps:
 
     - name: Set up Git repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Download dependencies
       run: sudo apt-get install -y python3 virtualenv
 
     - name: Download all workflow run artifacts
-      uses: actions/download-artifact@v2
+      uses: actions/download-artifact@v4.1.7
 
     - name: Run tests
       run: |
@@ -68,15 +68,15 @@ jobs:
         retention-days: 7
 
   release:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     needs: tests
 
     steps:
     - name: Set up Git repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Download all workflow run artifacts
-      uses: actions/download-artifact@v2
+      uses: actions/download-artifact@v4.1.7
 
     - name: Set release name
       id: version