Fix generic issue template style

The newlines make the view look broken when reported. Curiously enough,
this is not the case in the `New issue` form preview.

.github/ISSUE_TEMPLATE/3_other.yml

@@ -12,13 +12,9 @@ body:
       options:
         - label: I confirm this is **not a question, or helpers feature request**. *Otherwise, use the Discussions page.*
           required: true
-        - label: |
-            I confirm this is **not an issue encountered with an installed build of pypdfium2, but about some other aspect of the project** (specify below).
-            *Otherwise, use one of the package templates (PyPA/conda).*
+        - label: I confirm this is **not an issue encountered with an installed build of pypdfium2, but about some other aspect of the project** (specify below). *Otherwise, use one of the package templates (PyPA/conda).*
           required: true
-        - label: |
-            I confirm this is **not about an unofficial build of pypdfium2**, or an effort to create a such.
-            *We do not support third-party builds, and they are not eligible for a bug report. Please use our official packages instead.*
+        - label: I confirm this is **not about an unofficial build of pypdfium2**, or an effort to create a such. *We do not support third-party builds, and they are not eligible for a bug report. Please use our official packages instead.*
           required: true
 
   - type: input