component/pcre: Update download url

The former ftp.pcre.org FTP site is no longer available,
use sourceforge instead, see https://www.pcre.org/

component/pcre/buildout.cfg

@@ -7,7 +7,7 @@ parts =
 [pcre]
 recipe = slapos.recipe.cmmi
 shared = true
-url = https://ftp.pcre.org/pub/pcre/pcre-8.45.tar.bz2
+url = url = https://download.sourceforge.net/pcre/pcre/8.45/pcre-8.45.tar.bz
 md5sum = 4452288e6a0eefb2ab11d36010a1eebb
 configure-options =
   --disable-static