Use truncate_no_dots filter

Signed-off-by: Cintia Sanchez Garcia <[email protected]>

dco2/templates/output.md

@@ -23,5 +23,3 @@
   {%~ include "how_to_fix.md" +%}
 
 {% endif %}
-
-{% let x = "hello".to_string()|truncate_no_dots(2) %}

dco2/templates/summary.md

@@ -5,8 +5,7 @@
 | | Sha | Message | Pass or fail reason |
 | -- | ---- | :---- | :---- |
 {%+ for entry in commits %}
-  {% let (sha_truncated, rest) = entry.commit.sha.split_at(8) %}
-  {% let message = entry.commit.message.split_once('\n') %}
+  {% let sha_truncated = entry.commit.sha.to_string()|truncate_no_dots(7) %}
   {% let subject = entry.commit.message.lines().next().unwrap_or_default() %}
   {% if entry.errors.is_empty() %}
     | :green_circle: | [{{ sha_truncated }}]({{ entry.commit.html_url }}) | {{ subject|truncate(50) }} | {% if let Some(success_reason) = entry.success_reason %}`{{ success_reason|capitalize }}`{% endif %} |