Update docs/configuration/config-file-reference.template

Co-authored-by: Marco Pracucci <[email protected]>
Signed-off-by: Peter Štibraný <[email protected]>

Author: pstibrany

docs/configuration/config-file-reference.template

@@ -24,7 +24,7 @@ To specify which configuration file to load, pass the `-config.file` flag at the
 * `<string>`: a regular string
 * `<url>`: an URL
 * `<prefix>`: a CLI flag prefix based on the context (look at the parent configuration block to see which CLI flags prefix should be used)
-* `<relabel_config>`: a [prometheus relabeling configuration](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config).
+* `<relabel_config>`: a [Prometheus relabeling configuration](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config).
 * `<time>`: a timestamp, with available formats: `2006-01-20` (midnight, local timezone), `2006-01-20T15:04` (local timezone), and RFC 3339 formats: `2006-01-20T15:04:05Z` (UTC) or `2006-01-20T15:04:05+07:00` (explicit timezone)
 
 ### Use environment variables in the configuration