build(deps): bump diff and diff2html in /src/web_interface/static

Bumps [diff](https://github.com/kpdecker/jsdiff) to 8.0.3 and updates ancestor dependency [diff2html](https://github.com/rtfpessoa/diff2html). These dependencies need to be updated together.


Updates `diff` from 5.1.0 to 8.0.3
- [Changelog](https://github.com/kpdecker/jsdiff/blob/master/release-notes.md)
- [Commits](kpdecker/jsdiff@v5.1.0...v8.0.3)

Updates `diff2html` from 3.4.35 to 3.4.56
- [Release notes](https://github.com/rtfpessoa/diff2html/releases)
- [Commits](rtfpessoa/diff2html@3.4.35...3.4.56)

---
updated-dependencies:
- dependency-name: diff
  dependency-version: 8.0.3
  dependency-type: indirect
- dependency-name: diff2html
  dependency-version: 3.4.56
  dependency-type: direct:production
...

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

Author: dependabot[bot]

src/web_interface/static/package-lock.json

@@ -9,7 +9,7 @@
     "bootstrap-select": "^1.13.18",
     "bootstrap-table": "^1.23.5",
     "chart.js": "^2.3.0",
-    "diff2html": "^3.4.18",
+    "diff2html": "^3.4.56",
     "graphiql": "^3.2.3",
     "highlightjs-line-numbers.js": "^2.9.0",
     "jquery": "^3.5.0",