flake.lock: Updating 'revealjs (hakimel/reveal.js)' - 6510916b -> b1a9842b (#377)

### Changes for revealjs

On branch: master
Commits: 6510916b9f...b1a9842b2f

- [447fefd3](447fefd31c) scope print styles to .reveal [hakimel/reveal.js⁠#3348](http://r.duckduckgo.com/l/?uddg=https://github.com/hakimel/reveal.js/issues/3348)
- [32a16295](32a16295c3) Fixes typos

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

flake.lock

@@ -323,11 +323,11 @@
     "revealjs": {
       "flake": false,
       "locked": {
-        "lastModified": 1674035434,
-        "narHash": "sha256-z+XxEX+GVcnKt4GAollnHTEHA8YkQfVOLLUuHka6EtA=",
+        "lastModified": 1674652670,
+        "narHash": "sha256-ViqeZlOjQTlY0KM7YcOOjdgkxRLPMZrRKXTqtyc1I00=",
         "owner": "hakimel",
         "repo": "reveal.js",
-        "rev": "6510916b9f55a8f3110030bcdd1aee1b7fb77b6f",
+        "rev": "b1a9842b2f4544a2fda546383db38cc7a81f6b74",
         "type": "github"
       },
       "original": {