Update issue templates

.github/ISSUE_TEMPLATE/config.yml

@@ -2,4 +2,4 @@ blank_issues_enabled: false
 contact_links:
     - name: ⚠️ Source issue
       url: https://github.com/KotatsuApp/kotatsu-parsers/issues/new
-      about: If you have troubles with a manga parser or want to propose new manga source, please open an issue in the kotatsu-parsers repository instead
+      about: If you have a problem with a specific **manga source** or want to propose a new one, please open an issue in the kotatsu-parsers repository instead

.github/ISSUE_TEMPLATE/report_bug.yml

@@ -60,7 +60,7 @@ body:
       attributes:
           label: Acknowledgements
           options:
-              - label: I have searched the existing issues and this is a new ticket, **NOT** a duplicate or related to another open issue.
+              - label: This is not a duplicate of an existing issue. Please look through the list of [open issues](https://github.com/KotatsuApp/Kotatsu/issues) before creating a new one.
                 required: true
-              - label: If this is an issue with a parser, I should be opening an issue in the [parsers repository](https://github.com/KotatsuApp/kotatsu-parsers/issues/new/choose).
+              - label: This is not an issue with a specific manga source. Otherwise, you have to open an issue in the [parsers repository](https://github.com/KotatsuApp/kotatsu-parsers/issues/new/choose).
                 required: true

.github/ISSUE_TEMPLATE/request_feature.yml

@@ -20,5 +20,5 @@ body:
           label: Acknowledgements
           description: Read this carefully, we will close and ignore your issue if you skimmed through this.
           options:
-              - label: I have searched the existing issues and this is a new ticket, **NOT** a duplicate or related to another open issue.
-                required: true
+              - label: This is not a duplicate of an existing issue. Please look through the list of [open issues](https://github.com/KotatsuApp/Kotatsu/issues) before creating a new one.
+                required: true