Update GH issue templates for Linear compatibility (#4328)

Author: stephanie-anderson

.github/ISSUE_TEMPLATE/bug.yml

@@ -1,5 +1,6 @@
 name: 🐞 Bug Report
 description: Tell us about something that's not working the way we (probably) intend.
+labels: ["Python", "Bug"]
 body:
   - type: dropdown
     id: type

.github/ISSUE_TEMPLATE/feature.yml

@@ -1,6 +1,6 @@
 name: 💡 Feature Request
 description: Create a feature request for sentry-python SDK.
-labels: 'enhancement'
+labels: ["Python", "Feature"]
 body:
   - type: markdown
     attributes: