ci: Switch to ubuntu 22.04 and increase similarities with LiteX's CI.

.github/workflows/ci.yml

@@ -4,21 +4,21 @@ on: [push, pull_request]
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       # Checkout Repository
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Setup CCache
-        uses: hendrikmuhs/ccache-action@v1
+        uses: hendrikmuhs/ccache-action@v1.2
 
       # Install Tools
       - name: Install Tools
         run: |
           sudo apt-get install wget build-essential python3 ninja-build
           sudo apt-get install libevent-dev libjson-c-dev flex bison
-          sudo apt-get install libfl-dev libfl2 zlibc zlib1g-dev
+          sudo apt-get install libfl-dev libfl2 zlib1g-dev
           pip3 install setuptools
           pip3 install requests
           pip3 install pexpect
@@ -53,5 +53,4 @@ jobs:
       # Test
       - name: Run Tests
         run: |
-          export PATH=/usr/local/riscv/bin:$PATH
           python3 setup.py test