modify sampling default params

Author: chiranko

common/sampling.h

@@ -8,12 +8,12 @@
 
 // sampling parameters
 typedef struct llama_sampling_params {
-    int32_t top_k             = 40;    // <= 0 to use vocab size
+    int32_t top_k             = 10;    // <= 0 to use vocab size
     float   top_p             = 0.95f; // 1.0 = disabled
     float   tfs_z             = 1.00f; // 1.0 = disabled
     float   typical_p         = 1.00f; // 1.0 = disabled
     float   temp              = 0.80f; // 1.0 = disabled
-    float   repeat_penalty    = 1.10f; // 1.0 = disabled
+    float   repeat_penalty    = 1.00f; // 1.0 = disabled
     int32_t repeat_last_n     = 64;    // last n tokens to penalize (0 = disable penalty, -1 = context size)
     float   frequency_penalty = 0.00f; // 0.0 = disabled
     float   presence_penalty  = 0.00f; // 0.0 = disabled