[Snyk] Fix for 3 vulnerabilities

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `pip` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • docs/requirements.txt

⚠️ Warning

``` nbformat 4.4.0 requires jsonschema, which is not installed. mkdocs-material 8.0.1 requires mkdocs, which is not installed. mkdocs-material 8.0.1 requires pymdown-extensions, which is not installed. mkdocs-material 8.0.1 requires mkdocs-material-extensions, which is not installed. mkdocs-material 8.0.1 requires markdown, which is not installed. comet-ml 3.24.0 requires jsonschema, which is not installed. comet-ml 3.24.0 requires jsonschema, which is not installed. ```

Vulnerabilities that will be fixed

By pinning:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity
	434/1000 Why? Has a fix available, CVSS 4.4	Open Redirect SNYK-PYTHON-NOTEBOOK-1041707	notebook: 5.7.13 -> 6.1.5	No	No Known Exploit
	696/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 7.5	Regular Expression Denial of Service (ReDoS) SNYK-PYTHON-PYGMENTS-1086606	pygments: 2.5.2 -> 2.7.4	No	Proof of Concept
	589/1000 Why? Has a fix available, CVSS 7.5	Denial of Service (DoS) SNYK-PYTHON-PYGMENTS-1088505	pygments: 2.5.2 -> 2.7.4	No	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the effected dependencies could be upgraded.

Check the changes in this PR to ensure they won't cause issues with your project.

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[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov[bot]]

Codecov Report

Merging #171 (ae165af) into main (476542a) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #171   +/-   ##
=======================================
  Coverage   96.75%   96.75%           
=======================================
  Files          68       68           
  Lines        2064     2064           
=======================================
  Hits         1997     1997           
  Misses         67       67           

Flag	Coverage Δ
unittests	96.75% <ø> (ø)

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