Bump grouped pip dependencies

[akenmorris]

Combines dependabot updates:

• bleach[css] 6.2.0 -> 6.4.0 (Bump bleach from 6.2.0 to 6.4.0 #2564)
• jupyter-server 2.18.0 -> 2.20.0 (Bump jupyter-server from 2.18.0 to 2.20.0 #2563)
• tornado 6.5.5 -> 6.5.7 (Bump tornado from 6.5.5 to 6.5.7 #2560)
• pymdown-extensions 10.16.1 -> 10.21.3 (Bump pymdown-extensions from 10.16.1 to 10.21.3 #2555)
• idna 3.10 -> 3.15 (Bump idna from 3.10 to 3.15 #2554)
• urllib3 2.6.3 -> 2.7.0 (Bump urllib3 from 2.6.3 to 2.7.0 #2553)