Only drop :latest from model list

I installed `qwen2:05b` in my Ollama and then noticed I could not ask it to
use `qwen2`. Turns out the short name only works as a replacement for the
default, aka `:latest`.

Author: ccreutzi

ollamaChat.m

@@ -182,7 +182,7 @@
             endpoint = "http://localhost:11434/api/tags";
             response = webread(endpoint);
             mdls = string({response.models.name}).';
-            baseMdls = unique(extractBefore(mdls,":"));
+            baseMdls = unique(extractBefore(mdls,":latest"));
             % remove all those "mistral:latest", iff those are the only
             % model entries pointing at some model
             for base=baseMdls.'