CI: Install libpcre2-dev on ubuntu CI for building swig from source

Author: ptheywood

.github/workflows/Ubuntu.yml

@@ -149,7 +149,7 @@ jobs:
     - name: Install Swig >= 4.0.2
       run: |
         # Install additional apt-based dependencies required to build swig 4.0.2
-        sudo apt-get install -y bison
+        sudo apt-get install -y bison libpcre2-dev
         # Create a local directory to build swig in.
         mkdir -p swig-from-source && cd swig-from-source
         # Install SWIG building from source dependencies