sentence fix: remove duplicated verb in step list

[samsav]

Step 7 of the Choosing and using a workflow template procedure repeats the verb: "For example, you might want to change the value of on to change when the workflow runs."

This pull request removes the duplication and proposes the corrected sentence "For example, you might want to change the value of on when the workflow runs."

Why:

Closes: #40310

What's being changed (if available, include any code snippets, screenshots, or gifs):

-    Optionally, make additional changes. For example, you might want to change the value of `on` to change when the workflow runs.
+    Optionally, make additional changes. For example, you might want to change the value of `on` when the workflow runs.

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

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Table of review links

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Source	Review	Production	What Changed
actions/how-tos/write-workflows/use-workflow-templates.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.17 3.16 3.15 3.14

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

🤖 This comment is automatically generated.

[Sharra-writes]

@samsav Yep, that's a mistake! Thanks for fixing it.

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