GH Actions/label new PRs: fix yaml file

Grr... I do not like Yaml...

Either way, this fixes a syntax error I accidentally introduced in the Yaml file.

Author: jrfnl

.github/labeler.yml

@@ -77,16 +77,16 @@ labels:
 
   - label: "Type: breaking change"
     draft: false
-    body: "x\] Breaking change"
+    body: 'x\] Breaking change'
   - label: "Type: bug"
     draft: false
-    body: "x\] Bug fix"
+    body: 'x\] Bug fix'
   - label: "Type: enhancement"
     draft: false
-    body: "x\] New feature"
+    body: 'x\] New feature'
   - label: "Type: documentation"
     draft: false
-    body: "x\] Documentation improvement"
+    body: 'x\] Documentation improvement'
   - label: "Type: documentation"
     draft: false
     files: