GHA: update to current versions

Removes deprecation warnings about old Node versions.

Signed-off-by: Frank Lichtenheld <[email protected]>

.github/workflows/build.yaml

@@ -5,14 +5,14 @@ on: [push, pull_request]
 jobs:
   build:
     name: "build"
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - name: Install dependencies
-      run: sudo apt update && sudo apt install -y make python3-lxml python3-pycountry python3-html5lib sgml-base python3-pip  python3-google-i18n-address python3-jinja2 python3-markupsafe python3-pyflakes python3-requests 
+      run: sudo apt update && sudo apt install -y make python3-lxml python3-pycountry python3-html5lib sgml-base python3-pip  python3-google-i18n-address python3-jinja2 python3-markupsafe python3-pyflakes python3-requests
     - name: Install xml2rfc
       run: sudo pip3 install xml2rfc
-    - name: Checkout OpenVPN
-      uses: actions/checkout@v2
+    - name: Checkout RFC
+      uses: actions/checkout@v4
       with:
         path: rfc
     - name: build html
@@ -22,16 +22,12 @@ jobs:
       working-directory: rfc
       run: make openvpn-wire-protocol.txt
     - name: Archive html artifact
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: openvpn-wire-protocol.html
         path: rfc/openvpn-wire-protocol.html
     - name: Archive txt artifact
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: openvpn-wire-protocol.txt
         path: rfc/openvpn-wire-protocol.txt
-
-
-
-