Fix broken link to wildcard field type in index.md (opensearch-project#7565)

Link to wildcard field type documentation is incorrect

Signed-off-by: Thomas Wing <[email protected]>

Author: tomuk5

_field-types/supported-field-types/index.md

@@ -23,7 +23,7 @@ Boolean | [`boolean`]({{site.url}}{{site.baseurl}}/field-types/supported-field-t
 IP | [`ip`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/ip/): An IP address in IPv4 or IPv6 format. 
 [Range]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/range/) | A range of values (`integer_range`, `long_range`, `double_range`, `float_range`, `date_range`, `ip_range`).
 [Object]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/object-fields/)| [`object`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/object/): A JSON object. <br>[`nested`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/nested/): Used when objects in an array need to be indexed independently as separate documents.<br>[`flat_object`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/flat-object/): A JSON object treated as a string.<br>[`join`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/join/): Establishes a parent-child relationship between documents in the same index. 
-[String]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/string/)|[`keyword`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/keyword/): Contains a string that is not analyzed.<br> [`text`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/text/): Contains a string that is analyzed.<br> [`match_only_text`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/match-only-text/): A space-optimized version of a `text` field.<br>[`token_count`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/token-count/): Stores the number of analyzed tokens in a string. <br>[`wildcard`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/token-count/): A variation of `keyword` with efficient substring and regular expression matching.
+[String]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/string/)|[`keyword`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/keyword/): Contains a string that is not analyzed.<br> [`text`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/text/): Contains a string that is analyzed.<br> [`match_only_text`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/match-only-text/): A space-optimized version of a `text` field.<br>[`token_count`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/token-count/): Stores the number of analyzed tokens in a string. <br>[`wildcard`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/wildcard/): A variation of `keyword` with efficient substring and regular expression matching.
 [Autocomplete]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/autocomplete/) |[`completion`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/completion/): Provides autocomplete functionality through a completion suggester.<br> [`search_as_you_type`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/search-as-you-type/): Provides search-as-you-type functionality using both prefix and infix completion. 
 [Geographic]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/geographic/)| [`geo_point`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/geo-point/): A geographic point.<br>[`geo_shape`]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/geo-shape/): A geographic shape.
 [Rank]({{site.url}}{{site.baseurl}}/field-types/supported-field-types/rank/) | Boosts or decreases the relevance score of documents (`rank_feature`, `rank_features`).