[CI] Use Ubuntu 22.04, upgrade actions/checkout and actions/upload-ar…

…tifact

Ubuntu 20.04 comes with Freetype 2.10.1, Poppler requires at least 2.11

.github/workflows/build.yml

@@ -4,16 +4,16 @@ on: [push]
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Build project with APT
         run: './buildScripts/buildInstallLocallyApt'
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: my-artifact
           path: pdf2htmlEX/build