Update wording to indicate optional step

.github/ISSUE_TEMPLATE/01-report-existing-issue.yml

@@ -9,7 +9,8 @@ body:
         ## Title Your Issue With Filename!
         Please add the page's filename (eg "educators/how-tos/log-an-issue.rst")
         after the ":" in the box above. So the above box would say, "Issue with
-        page: educators/how-tos/log-an-issue.rst".
+        page: educators/how-tos/log-an-issue.rst". This helps us search &
+        organize tickets.
   - type: input
     id: file
     attributes:
@@ -21,7 +22,7 @@ body:
   - type: dropdown
     id: persona
     attributes:
-      label: What persona(s) does this page touch?
+      label: What persona(s) does this page touch? (skip if you don't know)
       multiple: true
       options:
         - Educators
@@ -42,7 +43,7 @@ body:
         - More docs are needed on this topic
         - This topic needs a quickstart
         - This topic needs a concept doc
-        - Other
+        - Other (detail below)
     validations:
       required: true
   - type: textarea