conf: Update preferred versions for WebKit components

Updated the preferred versions for several components in the
WebKit WPE stack to use specific stable versions, replacing
AUTOINC placeholders for more controlled and predictable builds.

- Set PREFERRED_VERSION_cog to 0.18+https
- Set PREFERRED_VERSION_libwpe to 1.16+https
- Set PREFERRED_VERSION_wpebackend-fdo to 1.14+https
- Set PREFERRED_VERSION_wpebackend-rdk to 1.20221201+git
- Set PREFERRED_VERSION_wpewebkit to 2.46+https

conf/include/webkit-bleeding.inc

@@ -3,11 +3,11 @@
 #
 #   require conf/include/webkit-bleeding.inc
 
-PREFERRED_VERSION_cog = "0.18+httpsAUTOINC+%"
-PREFERRED_VERSION_libwpe = "1.14+httpsAUTOINC+%"
-PREFERRED_VERSION_wpebackend-fdo = "devupstream+gitAUTOINC+%"
-PREFERRED_VERSION_wpebackend-rdk = "1.20200213+gitAUTOINC+%"
-PREFERRED_VERSION_wpewebkit = "2.42+httpsAUTOINC+%"
+PREFERRED_VERSION_cog = "0.18+https"
+PREFERRED_VERSION_libwpe = "1.16+https"
+PREFERRED_VERSION_wpebackend-fdo = "1.14+https"
+PREFERRED_VERSION_wpebackend-rdk = "1.20221201+git"
+PREFERRED_VERSION_wpewebkit = "2.46+https"
 
 SRCBRANCH:class-devupstream:pn-cog = "master"
 SRCREV:class-devupstream:pn-cog = "${AUTOREV}"