Update operators.md

[Prakhar9450]

Fixed incorrect rendering of pipes in Operator Table
Issue #5527

Fixes #5527

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[Prakhar9450]

Please merge my PR #5530

[parlough]

Thanks for working on this fix @Prakhar9450! We really appreciate it.

However, someone else opened a similar PR a bit earlier in #5528 (reopened in #5533). Their fix has landed so this is now fixed already.

Also for future reference, you'll need to sign the Google CLA for us to review and accept your contributions. The bot's comment earlier has more details: #5530 (comment)

Thanks again!