Bump katex from 0.16.18 to 0.16.21 in the npm_and_yarn group across 1 directory (#755)

* Bump katex in the npm_and_yarn group across 1 directory

Bumps the npm_and_yarn group with 1 update in the / directory: [katex](https://github.com/KaTeX/KaTeX).


Updates `katex` from 0.16.18 to 0.16.21
- [Release notes](https://github.com/KaTeX/KaTeX/releases)
- [Changelog](https://github.com/KaTeX/KaTeX/blob/main/CHANGELOG.md)
- [Commits](KaTeX/KaTeX@v0.16.18...v0.16.21)

---
updated-dependencies:
- dependency-name: katex
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

Signed-off-by: dependabot[bot] <[email protected]>

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: MattyTheHacker <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -4,17 +4,17 @@ GEM
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
     base64 (0.2.0)
-    bigdecimal (3.1.8)
+    bigdecimal (3.1.9)
     colorator (1.1.0)
-    concurrent-ruby (1.3.4)
+    concurrent-ruby (1.3.5)
     csv (3.3.2)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
     eventmachine (1.2.7)
-    ffi (1.17.0)
+    ffi (1.17.1)
     forwardable-extended (2.6.0)
-    google-protobuf (4.29.1)
+    google-protobuf (4.29.3)
       bigdecimal
       rake (>= 13)
     http_parser.rb (0.8.0)
@@ -63,8 +63,8 @@ GEM
     rexml (3.4.0)
     rouge (4.5.1)
     safe_yaml (1.0.5)
-    sass-embedded (1.83.0)
-      google-protobuf (~> 4.28)
+    sass-embedded (1.83.4)
+      google-protobuf (~> 4.29)
       rake (>= 13)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
@@ -83,4 +83,4 @@ DEPENDENCIES
   webrick
 
 BUNDLED WITH
-   2.6.1
+   2.6.2