CI: added Ubuntu 22.04

.github/workflows/c-cpp.yml

@@ -10,8 +10,8 @@ jobs:
     strategy:
       matrix:
         config:
-          - {os: ubuntu-latest, c: gcc-11, cpp: g++-11}
-          - {os: ubuntu-18.04, c: gcc, cpp: g++}
+          - {os: ubuntu-20.04, c: gcc-11, cpp: g++-11}
+          - {os: ubuntu-22.04, c: gcc-12, cpp: g++-12}
 
     steps:
     - name: Install dependencies
@@ -51,15 +51,15 @@ jobs:
 
   build-ubuntu-static-libs:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - name: Install dependencies
       run: |
         sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
         sudo apt update
-        sudo apt install -y git build-essential cmake autoconf libgss-dev gcc-11 g++-11
-        sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-11 100 --slave /usr/bin/g++ g++ /usr/bin/g++-11 --slave /usr/bin/gcov gcov /usr/bin/gcov-11
+        sudo apt install -y git build-essential cmake autoconf libgss-dev gcc-12 g++-12
+        sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 100 --slave /usr/bin/g++ g++ /usr/bin/g++-12 --slave /usr/bin/gcov gcov /usr/bin/gcov-12
 
     - name: Checkout repository
       uses: actions/checkout@v2
@@ -115,7 +115,7 @@ jobs:
 
   build-ubuntu-aarch64:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - name: Install dependencies