fix(dev): Clarify issue template framework field (#5480)

In our bug template, we ask users for their SDK version and, if they're using a framework SDK (react, etc), the version of the framework. Users often misunderstand, however, and just provide the SDK version twice. This aims to clarify the distinction, by making three changes:
- Adding clarifying language to the Framework Version field description.
- Changing the placeholder example for the field to include the name of the framework, and a recent IRL version.
- Changing the placeholder example for the SDK field to be the current version, to further emphasize which one is which.

It also fixes two schema errors highlighted by the linter.

.github/ISSUE_TEMPLATE/bug.yml

@@ -1,6 +1,6 @@
 name: 🐞 Bug Report
 description: Tell us about something that's not working the way we (probably) intend.
-labels: "Type: Bug"
+labels: ["Type: Bug"]
 body:
   - type: checkboxes
     attributes:
@@ -45,15 +45,15 @@ body:
     attributes:
       label: SDK Version
       description: What version of the SDK are you using?
-      placeholder: ex. 1.5.2
+      placeholder: ex. 7.8.0
     validations:
       required: true
   - type: input
     id: framework-version
     attributes:
       label: Framework Version
-      description: If you're using one of our framework-specific SDKs (`@sentry/react`, for example), what version of the framework are you using?
-      placeholder: ex. 1.5.2
+      description: If you're using one of our framework-specific SDKs (`@sentry/react`, for example), what version of the _framework_ (not SDK) are you using?
+      placeholder: ex. React 17.0.0
   - type: input
     id: link-to-sentry
     attributes:
@@ -88,5 +88,3 @@ body:
     attributes:
       value: |-
         ## Thanks 🙏
-    validations:
-      required: false