build(deps-dev): Bump dependency @ui5/linter to ^1.20.6 (#417)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [@ui5/linter](https://redirect.github.com/UI5/linter) | [`^1.20.5` ->
`^1.20.6`](https://renovatebot.com/diffs/npm/@ui5%2flinter/1.20.6/1.20.6)
|
![age](https://developer.mend.io/api/mc/badges/age/npm/@ui5%2flinter/1.20.6?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@ui5%2flinter/1.20.6/1.20.6?slim=true)
|

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package-lock.json

@@ -19,7 +19,7 @@
 	"devDependencies": {
 		"@eslint/js": "^9.39.1",
 		"@ui5/cli": "^4.0.38",
-		"@ui5/linter": "^1.20.5",
+		"@ui5/linter": "^1.20.6",
 		"@ui5/middleware-code-coverage": "^2.0.2",
 		"eslint": "^9.39.1",
 		"globals": "^16.5.0",