Update issue templates

.github/ISSUE_TEMPLATE/report_issue.yml

@@ -1,6 +1,6 @@
 name: 🐞 Issue report
-description: Report a source issue in Kotatsu
+description: Report a source issue with a source
-labels: [bug]
+labels: [ bug ]
 body:
 
     -   type: input

.github/ISSUE_TEMPLATE/request_source.yml

@@ -1,8 +1,11 @@
 name: 🌐 Source request
 description: Suggest a new source for Kotatsu
-labels: [source request]
+labels: [ source request ]
 body:
 
+    -   type: markdown
+        attributes:
+            value: Please specify source **name** and **language** in the issue title
     -   type: input
         id: name
         attributes: