ci: install cmake 3.26+ via pip for Ubuntu 22.04 compatibility

Author: Piotr Hałas

.github/workflows/ci.yml

@@ -46,7 +46,9 @@ jobs:
     - name: Install build dependencies
       run: |
         sudo apt-get update
-        sudo apt-get install -y cmake build-essential pkg-config
+        sudo apt-get install -y build-essential pkg-config python3-pip
+        pip3 install cmake>=3.26
+        cmake --version
         
     - name: Build Piper
       run: |