Update flowchart.md

[GRASBOCK]

fix callback by setting the window callback to the respective callback function in the jsfiddle and code sample

📑 Summary

The documentation jsfiddle on flowchart interaction doesn't work, because the callback function is not added.
I fixed the code samples and the jsfiddle and replaced the old jsfiddle with a link to the new one.

Resolves #5510

📏 Design Decisions

Saved a new jsfiddle that contains the change and made the changes in the markdown of the docs.

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added necessary unit/e2e tests.
• 📓 have added documentation. Make sure MERMAID_RELEASE_VERSION is used for all new features.
• 🔖 targeted develop branch

[netlify]

✅ Deploy Preview for mermaid-js ready!

Name	Link
🔨 Latest commit	6d2939c
🔍 Latest deploy log	https://app.netlify.com/sites/mermaid-js/deploys/66459606e0165b00087212a5
😎 Deploy Preview	https://deploy-preview-5517--mermaid-js.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[codecov]

Codecov Report

Attention: Patch coverage is 0.97143% with 1733 lines in your changes are missing coverage. Please review.

Project coverage is 5.73%. Comparing base (c562ca0) to head (356e520).
Report is 15 commits behind head on master.

❗ Current head 356e520 differs from pull request most recent head 6d2939c. Consider uploading reports for the commit 6d2939c to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #5517      +/-   ##
=========================================
- Coverage    5.74%   5.73%   -0.01%     
=========================================
  Files         276     278       +2     
  Lines       41886   41978      +92     
  Branches      514     490      -24     
=========================================
+ Hits         2407    2409       +2     
- Misses      39479   39569      +90     

Flag	Coverage Δ
unit	5.73% <0.97%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
.build/jisonTransformer.ts	0.00% <ø> (ø)
packages/mermaid-flowchart-elk/src/render-utils.ts	0.00% <ø> (ø)
packages/mermaid-flowchart-elk/src/styles.ts	0.00% <ø> (ø)
packages/mermaid-zenuml/src/parser.ts	0.00% <ø> (ø)
packages/mermaid/src/defaultConfig.ts	45.65% <100.00%> (ø)
...ackages/mermaid/src/diagrams/error/errorDiagram.ts	0.00% <ø> (ø)
packages/mermaid/src/diagrams/gantt/ganttDb.js	77.47% <100.00%> (ø)
packages/mermaid/src/config.ts	52.22% <50.00%> (ø)
packages/mermaid/src/dagre-wrapper/clusters.js	0.00% <0.00%> (ø)
...kages/mermaid/src/dagre-wrapper/intersect/index.js	0.00% <0.00%> (ø)
... and 66 more

... and 1 file with indirect coverage changes

[sidharthv96]

Switching from develop to master so docs can be out immediately.

[mermaid-bot]

@GRASBOCK, Thank you for the contribution!
You are now eligible for a year of Premium account on MermaidChart.
Sign up with your GitHub account to activate.