Update CI to Ubuntu 22.04 from 20.04

fixes #5756
closes https://github.com/official-stockfish/Stockfish/pull/5786

No functional change

.github/ci/matrix.json

@@ -1,8 +1,8 @@
 {
   "config": [
     {
-      "name": "Ubuntu 20.04 GCC",
-      "os": "ubuntu-20.04",
+      "name": "Ubuntu 22.04 GCC",
+      "os": "ubuntu-22.04",
       "simple_name": "ubuntu",
       "compiler": "g++",
       "comp": "gcc",
@@ -111,7 +111,7 @@
     {
       "binaries": "x86-64-avxvnni",
       "config": {
-        "ubuntu-20.04": null
+        "ubuntu-22.04": null
       }
     },
     {
@@ -153,7 +153,7 @@
     {
       "binaries": "apple-silicon",
       "config": {
-        "os": "ubuntu-20.04"
+        "os": "ubuntu-22.04"
       }
     }
   ]

.github/workflows/clang-format.yml

@@ -18,7 +18,7 @@ permissions:
 jobs:
   Clang-Format:
     name: Clang-Format
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
         with:

.github/workflows/tests.yml

@@ -13,15 +13,15 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - name: Ubuntu 20.04 GCC
-            os: ubuntu-20.04
+          - name: Ubuntu 22.04 GCC
+            os: ubuntu-22.04
             compiler: g++
             comp: gcc
             run_32bit_tests: true
             run_64bit_tests: true
             shell: bash
-          - name: Ubuntu 20.04 Clang
-            os: ubuntu-20.04
+          - name: Ubuntu 22.04 Clang
+            os: ubuntu-22.04
             compiler: clang++
             comp: clang
             run_32bit_tests: true