Generalize copilot-setup-steps sample intro instead of changing triggers

Revert the workflow trigger change and address the redundancy in the copy, per
maintainer feedback on issue 42379: the sample is an illustrative snippet rather
than something readers are expected to copy verbatim.

Generalize the sentence introducing the sample so it covers workflow triggers
alongside language and dependencies, and note that you wouldn't typically run on
both `push` and `pull_request`.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FuL8Cm3afpXSBiiGnUo7FA

Author: claude

content/copilot/how-tos/copilot-on-github/customize-copilot/customize-cloud-agent/customize-the-agent-environment.md

@@ -49,7 +49,7 @@ A `copilot-setup-steps.yml` file looks like a normal {% data variables.product.p
 > [!NOTE]
 > The `copilot-setup-steps.yml` workflow won't trigger unless it's present on your default branch.
 
-Here is a simple example of a `copilot-setup-steps.yml` file for a TypeScript project that clones the project, installs Node.js and downloads and caches the project's dependencies. You should customize this to fit your own project's language(s) and dependencies:
+Here is a simple example of a `copilot-setup-steps.yml` file for a TypeScript project that clones the project, installs Node.js and downloads and caches the project's dependencies. You should customize this to fit your own project, including its language(s), its dependencies, and the workflow triggers you need. For example, you wouldn't typically run on both `push` and `pull_request`.
 
 ```yaml copy
 name: "Copilot Setup Steps"
@@ -58,11 +58,7 @@ name: "Copilot Setup Steps"
 # allow manual testing through the repository's "Actions" tab
 on:
   workflow_dispatch:
-  # Limit `push` to your default branch. Changes on any other branch are already validated
-  # by the `pull_request` trigger, so this avoids two runs for the same commit.
   push:
-    branches:
-      - main
     paths:
       - .github/workflows/copilot-setup-steps.yml
   pull_request:

content/copilot/tutorials/cloud-agent/improve-a-project.md

@@ -98,8 +98,6 @@ Creating this file is optional but is a good idea if you use {% data variables.c
    on:
      workflow_dispatch:
      push:
-       branches:
-         - main
        paths:
          - .github/workflows/copilot-setup-steps.yml
      pull_request: