Fix type for postinstall documentation (#5955)

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Grammar issue in documentation

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Updated and fixed the line in the doc.
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Author: RahulReddy75

packages/docusaurus/docs/advanced/02-package-management/lifecycle-scripts.md

@@ -38,7 +38,7 @@ It is guaranteed to be called in topological order (in other words, your depende
 For backwards compatibility, the `preinstall` and `install` scripts, if presents, are called right before running the `postinstall` script from the same package. In general, prefer using `postinstall` over those two.
 
 :::caution
-Postinstall scripts have should be avoided at all cost, as they make installs slower and riskier. Many users will refuse to install dependencies that have `postinstall` scripts. Additionally, since the output isn't shown out of the box, using them to print a message to the user will not work as you expect.
+Postinstall scripts should be avoided at all cost, as they make installs slower and riskier. Many users will refuse to install dependencies that have `postinstall` scripts. Additionally, since the output isn't shown out of the box, using them to print a message to the user will not work as you expect.
 :::
 
 ## Environment variables