Fix the description of --keep-vars

[vicb]

Summary

Bindings are always overriden when --keep-vars is used or not.

Also clarify that secrets are never deleted.

Screenshots (optional)

Documentation checklist

• The documentation style guide has been adhered to.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

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PR Change Summary

Clarified the behavior of the --keep-vars option in the documentation, emphasizing that bindings are always overridden and that secrets are never deleted during deployment.

• Updated the description of the --keep-vars option to clarify its behavior regarding bindings.
• Specified that secrets are never deleted by a deployment, regardless of the --keep-vars flag.

Modified Files

• src/content/docs/workers/wrangler/commands.mdx

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[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/docs/workers/wrangler/	@cloudflare/wrangler, @irvinebroque, @ToriLindsay, @cloudflare/pcx-technical-writing

[github-actions]

Preview URL: https://c944ac45.preview.developers.cloudflare.com
Preview Branch URL: https://vicb-keep-vars.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/workers/wrangler/commands/	https://vicb-keep-vars.preview.developers.cloudflare.com/workers/wrangler/commands/