changelog: fix entries for #15522 and #15819 (#15998)

.changelog/15522.txt

@@ -1,4 +1,7 @@
 ```release-note:improvement
 server: Added raft snapshot arguments to server config
+```
+
+```release-note:improvement
 server: Certain raft configuration elements can now be reloaded without restarting the server
 ```

.changelog/15819.txt

@@ -1,3 +1,3 @@
 ```release-note:improvement
-"build: Added hyper-v isolation mode for docker on Windows"
+build: Added hyper-v isolation mode for docker on Windows
 ```

tools/cl-entry/main.go

@@ -29,7 +29,7 @@ const (
   Enter Note => `
 )
 
-var noteRe = regexp.MustCompile(`[a-z0-9/\s]+: .+`)
+var noteRe = regexp.MustCompile(`^[a-z0-9/\s]+: .+`)
 
 func main() {
 	pr, err := ask(pr)