Changed date fields to DD (MMM) -DD MMM YYYY

As per issue #22 : #22

Author: JC-swEng

.github/ISSUE_TEMPLATE/Add Conference.yaml

@@ -24,7 +24,7 @@ body:
     attributes:
       label: Conference Dates
       description: The start and end date of the conference.
-      placeholder: "YYYY-MM-DD - YYYY-MM-DD"
+      placeholder: "DD (MMM) -DD MMM YYYY"
     validations:
       required: true
   - type: dropdown
@@ -56,7 +56,7 @@ body:
     attributes:
       label: CFP Dates
       description: The start and end date of the Call for Papers.
-      placeholder: "YYYY-MM-DD"
+      placeholder: "DD (MMM) -DD MMM YYYY"
     validations:
       required: false  
   - type: textarea
@@ -66,4 +66,4 @@ body:
       description: Add any pertinent information about the conference e.g. focuses, topics, talk-length
       placeholder: "This is a general python conference with open spaces and sprints"
     validations:
-      required: false
+      required: false