Add lk override path to example.env.

example.env

@@ -2,3 +2,4 @@ FLASK_DEBUG=true
 TXL_DICTA_EP="changeme"
 TXL_FLASK_SECRET="changeme"
 TXL_LOGLEVEL="INFO"
+LOSHN_KOYDESH_O2P_SRC="${PWD}/scriptshifter/hooks/yiddish_/loshn_koydesh_o2p_override.tsv"