Retain issue body to allow file attachments

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -2,7 +2,6 @@
 name: 🐛 Bug Report
 about: Report a reproducible bug in the current release of NetBox
 labels: ["type: bug"]
-issue_body: false
 body:
   - type: markdown
     attributes:
@@ -57,3 +56,7 @@ body:
       placeholder: "A TypeError exception was raised"
     validations:
       required: true
+  - type: markdown
+    attributes:
+      value: "### Additional information
+      You can use the space below to provide any additional information or to attach files."

.github/ISSUE_TEMPLATE/documentation_change.yaml

@@ -2,7 +2,6 @@
 name: 📖 Documentation Change
 about: Suggest an addition or modification to the NetBox documentation
 labels: ["type: documentation"]
-issue_body: false
 body:
   - type: dropdown
     attributes:
@@ -32,3 +31,7 @@ body:
       description: "Describe the proposed changes and why they are necessary"
     validations:
       required: true
+  - type: markdown
+    attributes:
+      value: "### Additional information
+      You can use the space below to provide any additional information or to attach files."

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -2,7 +2,6 @@
 name: ✨ Feature Request
 about: Propose a new NetBox feature or enhancement
 labels: ["type: feature"]
-issue_body: false
 body:
   - type: markdown
     attributes:
@@ -52,3 +51,7 @@ body:
       description: "List any new dependencies on external libraries or services that this
         new feature would introduce. For example, does the proposal require the installation
         of a new Python package? (Not all new features introduce new dependencies.)"
+  - type: markdown
+    attributes:
+      value: "### Additional information
+      You can use the space below to provide any additional information or to attach files."

.github/ISSUE_TEMPLATE/housekeeping.yaml

@@ -2,7 +2,6 @@
 name: 🏡 Housekeeping
 about: A change pertaining to the codebase itself (developers only)
 labels: ["type: housekeeping"]
-issue_body: false
 body:
   - type: markdown
     attributes:
@@ -21,3 +20,7 @@ body:
       description: "Please provide justification for the proposed change(s)."
     validations:
       required: true
+  - type: markdown
+    attributes:
+      value: "### Additional information
+      You can use the space below to provide any additional information or to attach files."