[Infra] Ignore major/minor Docker updates

[martincostello]

#6321 (comment)

Changes

Only update to patch releases when updating Dockerfiles.

Merge requirement checklist

• CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
• Unit tests added/updated
• Appropriate CHANGELOG.md files updated for non-trivial changes
• Changes in public API reviewed (if applicable)

[Copilot]

Pull Request Overview

This PR updates the Dependabot configuration to only pull patch-level Docker image updates by ignoring major and minor version bumps.

• Added ignore rules under each Docker update block.
• Scoped ignore rules to three specific directories containing Dockerfiles.

Comments suppressed due to low confidence (3)

.github/dependabot.yml:16

• The ignore: block is indented too far left compared to its sibling keys (directory, schedule, labels). It should be indented to the same level as labels: (two spaces under the list item) so Dependabot can parse it correctly.

ignore:

.github/dependabot.yml:40

• This ignore: block under the second Docker section also has misaligned indentation. Align it to the same level as labels: to ensure the YAML is valid.

ignore:

.github/dependabot.yml:52

• The ignore: entry in the third Docker update block is similarly indented incorrectly. It needs to match the indentation of its sibling keys for proper parsing.

ignore:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.74%. Comparing base (3f86f47) to head (996897a).

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6326      +/-   ##
==========================================
- Coverage   86.76%   86.74%   -0.03%     
==========================================
  Files         258      258              
  Lines       11879    11879              
==========================================
- Hits        10307    10304       -3     
- Misses       1572     1575       +3     

Flag	Coverage Δ
unittests-Project-Experimental	86.64% <ø> (+0.32%)	⬆️
unittests-Project-Stable	86.51% <ø> (-0.16%)	⬇️
unittests-Solution	86.66% <ø> (+0.22%)	⬆️
unittests-UnstableCoreLibraries-Experimental	85.87% <ø> (+0.09%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

see 3 files with indirect coverage changes

[alanwest]

Approving/merging. I'm not a dependabot expert, so it's not clear to me if or how this will solve the issue, but I see it as a low risk to give it a shot.

@martincostello In the event this PR does not do what's intended maybe it makes sense to remove the weekly schedule temporarily. That might allow you to more quickly iterate on potential solutions. I'd be happy to merge things and give dependabot a kick to see what happens.

[martincostello]

Looks like it part-worked.

It's bumped the 8.0.x images to the latest patch, but it's not touched the 9.0.x ones.