Bump plugin-standard-files from 2026.6.2 to 2026.6.3

Bumps [plugin-standard-files](https://github.com/Webperf-se/plugin-standard-files) from 2026.6.2 to 2026.6.3.
- [Release notes](https://github.com/Webperf-se/plugin-standard-files/releases)
- [Commits](Webperf-se/plugin-standard-files@2026.6.2...2026.6.3)

---
updated-dependencies:
- dependency-name: plugin-standard-files
  dependency-version: 2026.6.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -23,7 +23,7 @@
     "plugin-html": "2026.6.0",
     "plugin-javascript": "2026.6.0",
     "plugin-pagenotfound": "2026.6.0",
-    "plugin-standard-files": "2026.6.2",
+    "plugin-standard-files": "2026.6.3",
     "plugin-accessibility-statement": "2026.6.0",
     "plugin-webperf-core": "2026.6.1"
   },