[rmodels] Fix -Wstringop-truncation warning (#4096)

rmodels.c: In function ‘LoadBoneInfoGLTF.isra’:
rmodels.c:4874:32: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
 4874 |         if (node.name != NULL) strncpy(bones[i].name, node.name, sizeof(bones[i].name));
      |                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/rmodels.c

@@ -4871,7 +4871,11 @@ static BoneInfo *LoadBoneInfoGLTF(cgltf_skin skin, int *boneCount)
     for (unsigned int i = 0; i < skin.joints_count; i++)
     {
         cgltf_node node = *skin.joints[i];
-        if (node.name != NULL) strncpy(bones[i].name, node.name, sizeof(bones[i].name));
+        if (node.name != NULL)
+        {
+            strncpy(bones[i].name, node.name, sizeof(bones[i].name));
+            bones[i].name[sizeof(bones[i].name) - 1] = '\0';
+        }
 
         // Find parent bone index
         unsigned int parentIndex = -1;