avoid external URLs for images in documentation that can break the build when unavailable

[hohwille]

avoid external URLs for images in documentation that can break the build when unavailable

This PR fixes the build pipeline

Error:  asciidoctor: ERROR: IDEasy.adoc: failed to parse formatted text: [Intergate git-bash into Windows-Terminal] | <em>https://mobeigi.com/_next/image/?url=%2Fapi%2Fmedia%2Ffile%2Fgit-installer-windows-terminal-profile.webp&w=1200&q=75</em>

Implemented changes:

• replace image URL with local image file reference

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Testing instructions

Please add conscise, understandable instructions on how a reviewer can test/verify the functionality of your contribution here:

1. Check that build pipeline and NightlyBuild goes back to green.

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[coveralls]

Coverage Report for CI Build 26443679403

Warning

No base build found for commit 22c5b14 on main.
Coverage changes can't be calculated without a base build.
If a base build is processing, this comment will update automatically when it completes.

Coverage: 71.132%

Details

• Patch coverage: No coverable lines changed in this PR.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

Requires a base build to compare against. How to fix this →

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Coverage Stats

Relevant Lines:	15566
Covered Lines:	11547
Line Coverage:	74.18%
Relevant Branches:	6954
Covered Branches:	4472
Branch Coverage:	64.31%
Branches in Coverage %:	Yes
Coverage Strength:	3.14 hits per line

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💛 - Coveralls