[bootstrap] Change to 2.42 cerbero branch

Author: zhani

tools/scripts/bootstrap.py

@@ -84,7 +84,7 @@ class Bootstrap:
     default_version = "2.42.1"
 
     _cerbero_origin = "https://github.com/Igalia/wpe-android-cerbero.git"
-    _cerbero_branch = "main"
+    _cerbero_branch = "2.42"
 
     _packages_url_template = "https://wpewebkit.org/android/bootstrap/{version}/{filename}"
     _devel_package_name_template = "wpewebkit-android-{arch}-{version}.tar.xz"