docs: fix 'WithKeepAlive' docs (#823)

docs(ollama): fix 'WithKeepAlive' docs

llms/ollama/options.go

@@ -38,7 +38,7 @@ func WithFormat(format string) Option {
 // WithKeepAlive controls how long the model will stay loaded into memory following the request (default: 5m)
 // only supported by ollama v0.1.23 and later
 //
-//	If set to a positive duration (e.g. 20m, 1hr or 30), the model will stay loaded for the provided duration
+//	If set to a positive duration (e.g. 20m, 1h or 30), the model will stay loaded for the provided duration
 //	If set to a negative duration (e.g. -1), the model will stay loaded indefinitely
 //	If set to 0, the model will be unloaded immediately once finished
 //	If not set, the model will stay loaded for 5 minutes by default