task: update contributing guide (guacsec#669)

Signed-off-by: Carlos Feria <2582866+carlosthe19916@users.noreply.github.com>

Author: carlosthe19916

CONTRIBUTING.md

@@ -19,16 +19,6 @@ Before submitting a PR:
 - Include relevant tests and documentation updates.
 - Link the PR to the corresponding issue (if applicable).
 
-Every PR should be annotated with an icon indicating whether it's
-a:
-
-- Breaking change: :warning: (`:warning:`)
-- Non-breaking feature: :sparkles: (`:sparkles:`)
-- Patch fix: :bug: (`:bug:`)
-- Docs: :book: (`:book:`)
-- Infra/Tests/Other: :seedling: (`:seedling:`)
-- No release note: :ghost: (`:ghost:`)
-
 For more information read [Trustification Versioning](https://github.com/trustification/release-tools/blob/main/VERSIONING.md).
 
 ### 3. Documentation Updates