remove --pooling override and clarify embd_normalize usage

Author: danbev

examples/model-conversion/scripts/embedding/modelcard.template

@@ -7,7 +7,7 @@ base_model:
 Recommended way to run this model:
 
 ```sh
-llama-server -hf {namespace}/{model_name}-GGUF --embedding --pooling none
+llama-server -hf {namespace}/{model_name}-GGUF
 ```
 
 Then the endpoint can be accessed at http://localhost:8080/embedding, for
@@ -16,21 +16,33 @@ example using `curl`:
 curl --request POST \
     --url http://localhost:8080/embedding \
     --header "Content-Type: application/json" \
-    --data '{{"input": "Hello embeddings", "embd_normalize": -1}}' \
+    --data '{{"input": "Hello embeddings"}}' \
     --silent
 ```
 
-Alternatively, the `llama-embedding`command line tool can be used:
+Alternatively, the `llama-embedding` command line tool can be used:
 ```sh
-llama-embedding -hf {namespace}/{model_name}-GGUF --pooling none --embd-normalize 2 --verbose-prompt -p "Hello embeddings"
+llama-embedding -hf {namespace}/{model_name}-GGUF --verbose-prompt -p "Hello embeddings"
 ```
 
 #### embd_normalize
-When a pooling method is specified the normalization can be controlled by the
-`embd_normalize` parameter. The default value is `2` which means that the
-embeddings are normalized using the Euclidean norm (L2). Other options are:
+When a model uses pooling, or the pooling method is specified using `--pooling`,
+the normalization can be controlled by the `embd_normalize` parameter.
+
+The default value is `2` which means that the embeddings are normalized using
+the Euclidean norm (L2). Other options are:
 * -1 No normalization
 *  0 Max absolute
 *  1 Taxicab
 *  2 Euclidean/L2
 * \>2 P-Norm
+
+This can be passed in the request body to `llama-server`, for example:
+```sh
+    --data '{{"input": "Hello embeddings", "embd_normalize": -1}}' \
+```
+
+And for `llama-embedding`, by passing `--embd-normalize <value>`, for example:
+```sh
+llama-embedding -hf {namespace}/{model_name}-GGUF  --embd-normalize -1 -p "Hello embeddings"
+```