[8.x] Remove .swn file (#217795) (#217798)

# Backport

This will backport the following commits from `main` to `8.x`:
- [Remove .swn file
(#217795)](https://github.com/elastic/kibana/pull/217795)

<!--- Backport version: 9.6.6 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

<!--BACKPORT [{"author":{"name":"Joe
Reuter","email":"johannes.reuter@elastic.co"},"sourceCommit":{"committedDate":"2025-04-10T09:23:22Z","message":"Remove
.swn file (#217795)\n\nThis is a vim swap file I accidentally commited,
let's get rid of
it.","sha":"9924886236a2f07ef52c62a8f09ab7ae71cdb691","branchLabelMapping":{"^v9.1.0$":"main","^v8.19.0$":"8.x","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:skip","skip-ci","backport:version","v9.1.0","v8.19.0"],"title":"Remove
.swn
file","number":217795,"url":"https://github.com/elastic/kibana/pull/217795","mergeCommit":{"message":"Remove
.swn file (#217795)\n\nThis is a vim swap file I accidentally commited,
let's get rid of
it.","sha":"9924886236a2f07ef52c62a8f09ab7ae71cdb691"}},"sourceBranch":"main","suggestedTargetBranches":["8.x"],"targetPullRequestStates":[{"branch":"main","label":"v9.1.0","branchLabelMappingKey":"^v9.1.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/217795","number":217795,"mergeCommit":{"message":"Remove
.swn file (#217795)\n\nThis is a vim swap file I accidentally commited,
let's get rid of
it.","sha":"9924886236a2f07ef52c62a8f09ab7ae71cdb691"}},{"branch":"8.x","label":"v8.19.0","branchLabelMappingKey":"^v8.19.0$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Joe Reuter <johannes.reuter@elastic.co>

.gitignore

@@ -73,6 +73,7 @@ selenium
 .webpack.babelcache
 *.swp
 *.swo
+*.swn
 *.out
 package-lock.json
 !/.buildkite/package-lock.json