[docs] Fix various syntax and rendering errors (elastic#2940)

* fix various syntax and rendering issues

* fix image

Author: colleenmcginnis

docs/reference/client-helpers.md

@@ -12,7 +12,7 @@ You can find here a collection of simple helper functions that abstract some spe
 
 There are several helpers for the bulk API since its requirement for specific formatting and other considerations can make it cumbersome if used directly.
 
-All bulk helpers accept an instance of `{{es}}` class and an iterable `action` (any iterable, can also be a generator, which is ideal in most cases since it allows you to index large datasets without the need of loading them into memory).
+All bulk helpers accept an instance of `Elasticsearch` class and an iterable `action` (any iterable, can also be a generator, which is ideal in most cases since it allows you to index large datasets without the need of loading them into memory).
 
 The items in the iterable `action` should be the documents we wish to index in several formats. The most common one is the same as returned by `search()`, for example:
 

docs/images/python-example.png renamed to docs/reference/images/python-example.png

@@ -6,7 +6,7 @@ The Python Elasticsearch client provides several ways to send queries to Elastic
 
 Elasticsearch APIs are grouped by namespaces.
 
- * There's the global namespace, with APIs like the Search API (`GET _search`) or the Index API (`PUT /<target>/_doc/<_id>` and related endpoints). 
+ * There's the global namespace, with APIs like the Search API (`GET _search`) or the Index API (`PUT /<target>/_doc/<_id>` and related endpoints).
  * Then there are all the other namespaces, such as:
    * Indices with APIs like the Create index API (`PUT /my-index`),
    * ES|QL with the Run an ES|QL query API (`POST /_async`),
@@ -28,10 +28,8 @@ How can you figure out the namespace?
 * Finally, for Elasticsearch 8.x, most examples in the [Elasticsearch guide](https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html) are also available in Python. (This is still a work in progress for Elasticsearch 9.x.) In the example below, `client.ingest.put_pipeline(...)` is the function that calls the "Create or update a pipeline" API.
 
 
-:::{image} ../images/python-example.png
-:alt: Python code example in the Elasticsearch guide
-:::
- 
+![Python code example in the Elasticsearch guide](images/python-example.png)
+
 ## Parameters
 
 Now that you know which functions to call, the next step is parameters. To avoid ambiguity, the Python Elasticsearch client mandates keyword arguments. To give an example, let's look at the ["Create an index" API](https://elasticsearch-py.readthedocs.io/en/stable/api/indices.html#elasticsearch.client.IndicesClient.create). There's only one required parameter, `index`, so the minimal form looks like this: