Update dependency prismjs to v1.29.0 (#54)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -29,7 +29,7 @@
     "@scullyio/scully-plugin-puppeteer": "2.1.36",
     "lunr": "2.3.9",
     "lunr-languages": "1.9.0",
-    "prismjs": "1.28.0",
+    "prismjs": "1.29.0",
     "rxjs": "7.5.6",
     "tslib": "2.4.0",
     "zone.js": "0.11.8"