Fix postman collection link (#3242)

* fix postman collection link

* Update code samples [skip ci]

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: guimachiavelli

guides/postman_collection.mdx

@@ -11,7 +11,7 @@ If you don't have Postman already, you can [download it here](https://www.postma
 
 ## Import the collection
 
-Once you have downloaded the [Postman collection](/assets/misc/meilisearch-collection-postman.json), you need to import it into Postman.
+Once you have downloaded the <a href="/assets/misc/meilisearch-collection-postman.json" download="meilisearch-collection-postman.json">Postman collection</a>, you need to import it into Postman.
 
 <Frame>
   <img src="/assets/images/postman/import.png" alt="The 'Import' button" />

snippets/samples/code_samples_get_facet_search_settings_1.mdx

@@ -16,4 +16,8 @@ $client->index('INDEX_NAME')->getFacetSearch();
 ```ruby Ruby
 client.index('INDEX_UID').facet_search_setting
 ```
+
+```go Go
+client.Index("books").GetFacetSearch()
+```
 </CodeGroup>

snippets/samples/code_samples_get_prefix_search_settings_1.mdx

@@ -16,4 +16,8 @@ $client->index('INDEX_NAME')->getPrefixSearch();
 ```ruby Ruby
 client.index('INDEX_UID').prefix_search
 ```
+
+```go Go
+client.Index("books").GetPrefixSearch()
+```
 </CodeGroup>

snippets/samples/code_samples_reset_facet_search_settings_1.mdx

@@ -16,4 +16,8 @@ $client->index('INDEX_NAME')->resetFacetSearch();
 ```ruby Ruby
 client.index('INDEX_UID').reset_facet_search_setting
 ```
+
+```go Go
+client.Index("books").ResetFacetSearch()
+```
 </CodeGroup>

snippets/samples/code_samples_reset_prefix_search_settings_1.mdx

@@ -16,4 +16,8 @@ $client->index('INDEX_NAME')->resetPrefixSearch();
 ```ruby Ruby
 client.index('INDEX_UID').reset_prefix_search
 ```
+
+```go Go
+client.Index("books").ResetPrefixSearch()
+```
 </CodeGroup>

snippets/samples/code_samples_update_facet_search_settings_1.mdx

@@ -18,4 +18,8 @@ $client->index('INDEX_NAME')->updateFacetSearch(false);
 ```ruby Ruby
 client.index('INDEX_UID').update_facet_search_setting(false)
 ```
+
+```go Go
+client.Index("books").UpdateFacetSearch(false)
+```
 </CodeGroup>

snippets/samples/code_samples_update_prefix_search_settings_1.mdx

@@ -18,4 +18,8 @@ $client->index('INDEX_NAME')->updatePrefixSearch('disabled');
 ```ruby Ruby
 client.index('INDEX_UID').update_prefix_search('disabled')
 ```
+
+```go Go
+client.Index("books").UpdatePrefixSearch("disabled")
+```
 </CodeGroup>