[minor] Add mas_special_characters to install PipelineRun template (#20)

Co-authored-by: Matheus Cardoso de Medeiros <Matheus.Cardoso@ibm.com>
Co-authored-by: David Parker <parkerda@uk.ibm.com>

Author: 3 people

src/mas/devops/templates/pipelinerun-install.yml.j2

@@ -426,6 +426,10 @@ spec:
     - name: mas_domain
       value: "{{ mas_domain }}"
 {%- endif %}
+{%- if mas_special_characters is defined and mas_special_characters != "" %}
+    - name: mas_special_characters
+      value: "{{ mas_special_characters }}"
+{%- endif %}
 {%- if mas_cluster_issuer is defined and mas_cluster_issuer != "" %}
     - name: mas_cluster_issuer
       value: "{{ mas_cluster_issuer }}"