docs(apigee-envoy-quickstart): fix copy-paste error on cli instruction

[danistrebel]

Description

What's changed, or what was fixed?

• Fix Copy paste error for standalone envoy example

Housekeeping

(please check all that apply [x], do not edit the text)

• I have run all the tests locally and they all pass.
• I have followed the relevant style guide for my changes.

Full Repo Validation Required

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• PR requires full pipeline run (Run for changes only by default).

CC: @apigee-devrel-reviewers

[danistrebel]

/gcbrun

[apigee-devrel-bot]

Pipeline Report

Pipeline	Result	Elapsed Wall Time
TOTAL PIPELINE (no change)	pass	0

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Commit version: 06189a0

[github-actions]

Mega-Linter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	4		0	0.13s
✅ BASH	bash-exec	97		0	9.67s
✅ BASH	shellcheck	97		0	12.72s
⚠️ BASH	shfmt	97		85	10.09s
⚠️ COPYPASTE	jscpd	yes		52	4.86s
✅ CREDENTIALS	secretlint	yes		no	5.57s
✅ DOCKERFILE	dockerfilelint	8		0	2.65s
✅ DOCKERFILE	hadolint	8		0	2.01s
✅ GIT	git_diff	yes		no	0.1s
✅ JAVA	checkstyle	4		0	7.46s
✅ JAVASCRIPT	eslint	90		0	2.12s
✅ JSON	eslint-plugin-jsonc	63		0	6.16s
✅ JSON	jsonlint	63		0	26.91s
⚠️ JSON	prettier	63		1	5.69s
✅ JSON	v8r	63		0	159.89s
⚠️ MARKDOWN	markdownlint	47		97	0.93s
⚠️ MARKDOWN	markdown-link-check	47		1	136.59s
⚠️ MARKDOWN	markdown-table-formatter	47		1	0.49s
✅ OPENAPI	spectral	13		0	37.63s
⚠️ SPELL	cspell	769		1099	38.04s
⚠️ SPELL	misspell	769		1	0.58s
✅ XML	xmllint	389		0	0.17s
⚠️ YAML	prettier	36		1	3.51s
✅ YAML	v8r	36		0	78.19s
✅ YAML	yamllint	36		0	1.16s

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