prevent markdown from rendering emoji

The text `:mm:` in `"YYYY-MM-DDThh:mm:ssZ"` was being rendered as an emoji. Inserting `<zero-width space>` prevents this.

Author: rmseifried

docs/solr-field-suffixes.md

@@ -5,19 +5,17 @@ hide:
 
 # Solr Field Suffixes
 
-The following suffixes are part of the OGM Aardvark schema and may be used by custom fields. 
+The following suffixes are part of the OGM Aardvark schema and may be used by custom fields.
 
 | Field Suffix | Type                     | Description                     | Example   |
 |:-------------|:-------------------------|:--------------------------------|:----------|
 | `_b`         | Boolean                  | Values can be `true` or `false` | `gbl_georeferenced_b`|
 | `_im`        | Integer, multivalued     | Digits                          | `gbl_indexYear_im`|
 | `_drsim`     | Date range, multivalued  | Date range in a specified string format: "[1980 TO 1995]" | `gbl_dateRange_drsim` |
-| `_dt`        | Date                     | Date and time in a specified string format: "YYYY-MM-DDThh:mm:ssZ" | `gbl_mdModified_dt`|
+| `_dt`        | Date                     | Date and time in a specified string format: "YYYY-MM-DDThh:<zero-width space>mm:ssZ" | `gbl_mdModified_dt`|
 | `_s`         | String                   | Single string of text           | `dct_title_s` |
 | `_sm`        | String, multivalued      | Multiple strings of text        | `dct_subject_sm` |
 
 !!! tip
 
 	For a full list of spatial field types and their suffixes used in GeoBlacklight, see [https://github.com/geoblacklight/geoblacklight/blob/main/solr/conf/schema.xml#L14](https://github.com/geoblacklight/geoblacklight/blob/main/solr/conf/schema.xml#L14).
-
-