[docs] - toYaml / toYamlPretty (#1720)

* Updates the documentation adding a section for toYaml and toYamlPretty

Signed-off-by: James Payne <[email protected]>

* Update with consistent comma placement

Signed-off-by: James Payne <[email protected]>

* Update with trailing period

Signed-off-by: James Payne <[email protected]>

---------

Signed-off-by: James Payne <[email protected]>

Author: jamoflaw

content/en/docs/chart_template_guide/function_list.md

@@ -701,6 +701,7 @@ The following type conversion functions are provided by Helm:
 - `fromJson`: Convert a JSON string to an object.
 - `fromJsonArray`: Convert a JSON array to a list.
 - `toYaml`: Convert list, slice, array, dict, or object to indented yaml, can be used to copy chunks of yaml from any source. This function is equivalent to GoLang yaml.Marshal function, see docs here: https://pkg.go.dev/gopkg.in/yaml.v2#Marshal
+- `toYamlPretty`: Convert list, slice, array, dict, or object to indented yaml. Equivalent to `toYaml` but will additionally indent lists by 2 spaces.
 - `toToml`: Convert list, slice, array, dict, or object to toml, can be used to copy chunks of toml from any source.
 - `fromYamlArray`: Convert a YAML array to a list.
 
@@ -826,6 +827,32 @@ greeting: |
 {{ end }}
 ```
 
+### toYaml, toYamlPretty
+
+The `toYaml` and `toYamlPretty` functions encode an object (list, slice, array, dict, or object) into an indented YAML string.
+
+> Note that `toYamlPretty` is functionally equivalent but will output YAML with additional indents for list elements
+
+```yaml
+# toYaml
+- name: bob
+  age: 25
+  hobbies:
+  - hiking
+  - fishing
+  - cooking
+```
+
+```yaml
+# toYamlPretty
+- name: bob
+  age: 25
+  hobbies:
+    - hiking
+    - fishing
+    - cooking
+```
+
 ### fromYamlArray
 
 The `fromYamlArray` function takes a YAML Array and returns a list that can be used in templates.