Docs: Update broken source code link in `WP_Filesystem_SSH2` class.

Props mryoga, finchps.
Fixes #48467.
Built from https://develop.svn.wordpress.org/trunk@46742


git-svn-id: http://core.svn.wordpress.org/trunk@46542 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-filesystem-ssh2.php

@@ -9,7 +9,7 @@
  * Complie libssh2 (Note: Only 0.14 is officaly working with PHP 5.2.6+ right now, But many users have found the latest versions work)
  *
  * cd /usr/src
- * wget http://surfnet.dl.sourceforge.net/sourceforge/libssh2/libssh2-0.14.tar.gz
+ * wget https://www.libssh2.org/download/libssh2-0.14.tar.gz
  * tar -zxvf libssh2-0.14.tar.gz
  * cd libssh2-0.14/
  * ./configure

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.4-alpha-46741';
+$wp_version = '5.4-alpha-46742';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.