chore(docs): Remove -icon string from icon png's (#2040)

* rename icons (remove `-icon`)

* Remove (`-icon`) from chart.yaml

* Add 2 icons

* slight format change

* remove -icon

charts/stable/openldap/Chart.yaml

@@ -7,7 +7,7 @@ dependencies:
 deprecated: false
 description: Community developed LDAP software
 home: https://www.openldap.org
-icon: https://truecharts.org/_static/img/appicons/openldap-icon.png
+icon: https://truecharts.org/_static/img/appicons/openldap.png
 keywords:
 - ldap
 - openldap