[aws] fix image link in README

[kaiyan-sheng]

What does this PR do?

This PR is to fix image link in AWS readme file: https://github.com/elastic/integrations/blob/db7028b3383c325063a473e45d45b51ddf628f73/packages/aws/docs/README.md#debug

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 9a0ead2

History

• 💚 Build #57 succeeded db7028b

cc @kaiyan-sheng

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2023-06-13T20:24:04.768+0000

• Duration: 52 min 54 sec

Test stats 🧪

Test	Results
Failed	0
Passed	190
Skipped	4
Total	194

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[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (15/15)	💚
Files	93.75% (15/16)	❕
Classes	93.75% (15/16)	❕
Methods	85.921% (238/277)	❕
Lines	85.925% (7387/8597)	❕
Conditionals	100.0% (0/0)	💚

[elasticmachine]

Package aws - 1.44.2 containing this change is available at https://epr.elastic.co/search?package=aws