Upgrade to python3.12 for centos/fedora builds (#406)

Co-authored-by: Roberto Pastor Muela <[email protected]>

.github/workflows/ci_cd.yml

@@ -9,7 +9,7 @@ on:
       - main
 
 env:
-  MAIN_PYTHON_VERSION: '3.11'
+  MAIN_PYTHON_VERSION: '3.12'
   PRECOMPILE_PYTHON_VERSION: '3.11.9'
   DOCUMENTATION_CNAME: 'installer.docs.pyansys.com'
   LIBRARY_NAME: 'ansys-tools-installer'
@@ -260,12 +260,15 @@ jobs:
         run: |
           yum update -y
           yum groupinstall "Development Tools" -y
+          yum install python3.12 python3.12-pip -y
+          update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.12 1
+          update-alternatives --set python3 /usr/bin/python3.12
+
 
       - name: Install CentOS/Fedora Dependencies
         if: contains(matrix.os, 'centos') || contains(matrix.os, 'fedora')
         run: |
-          yum install python3 \
-            python3-pip \
+          yum install python3-pip \
             wget \
             binutils \
             ruby-devel \
@@ -333,6 +336,7 @@ jobs:
 
       - name: Update pip
         run: |
+          python3 --version
           python3 -m pip install pip -U
 
       - name: Install pip Dependencies