solr.in.cmd and solr.in.sh still reference obsolete jks files

When following the Enabling SSL documentation (https://lucene.apache.org/solr/guide/8_5/enabling-ssl.html), the end result is an error if you miss a critical detail: that you need to change the .jks file extension in two lines to .p12.

Please update the default bin/solr.in.cmd and bin/solr.in.sh files to reference p12 files. It appears that the JKS format is obsolete, so there's no reason to reference those by default.