Added icon for Pulumi (#759)

* Added icon for Pulumi

* updated changelog

* fix review

---------

Co-authored-by: tessier <tessier@luxeys.com>

diagrams/onprem/iac.py

@@ -20,6 +20,10 @@ class Awx(_Iac):
     _icon = "awx.png"
 
 
+class Pulumi(_Iac):
+    _icon = "pulumi.png"
+
+
 class Puppet(_Iac):
     _icon = "puppet.png"
 

docs/nodes/onprem.md

@@ -281,6 +281,9 @@ Node classes list of the onprem provider.
 <img width="30" src="/img/resources/onprem/iac/awx.png" alt="Awx" style="float: left; padding-right: 5px;" >
 **diagrams.onprem.iac.Awx**
 
+<img width="30" src="/img/resources/onprem/iac/pulumi.png" alt="Pulumi" style="float: left; padding-right: 5px;" >
+**diagrams.onprem.iac.Pulumi**
+
 <img width="30" src="/img/resources/onprem/iac/puppet.png" alt="Puppet" style="float: left; padding-right: 5px;" >
 **diagrams.onprem.iac.Puppet**