pipeline.gommit: allow more characters in prefix

For profiles/roles with - or _ in their name. In the future we should
rename all - to _ and adjust the regex to forbid all -.

Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>

.gommit.toml

@@ -4,7 +4,7 @@ check-summary-length=true
 summary-length=50
 
 [matchers]
-all='^(?:(?:Add|Remove|Update|Enable|Disable) |(?:role|profile|id|pipeline)\.[\w\-_]+: )[\w \.\+\-]+\n(?:(?:\n\- .*)+\n)?(?:\nSigned-off-by: \w+ \w+ <.*@.*>)'
+all='^(?:(?:Add|Remove|Update|Enable|Disable) |(?:role|profile|id|pipeline)\.[\w\-\_]+: )[\w \.\+\-]+\n(?:(?:\n\- .*)+\n)?(?:\nSigned-off-by: \w+ \w+ <.*@.*>)'
 
 [examples]
 summary_variant_one="""