Update references

[JimBobSquarePants]

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Description

[Copilot]

Pull Request Overview

This PR updates several references and minor behaviors, including changes in test outputs, API calls, package versions, and CI workflow improvements.

• Updated expected newline count in a text rendering test
• Changed API call syntax for image bounds in FillProcessor and FillPathProcessor
• Upgraded package reference versions and improved the Ubuntu CI workflow step

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/ImageSharp.Drawing.Tests/Drawing/Text/DrawTextOnImageTests.cs	Updated the expected newline repetition count in the text rendering test.
src/ImageSharp.Drawing/Processing/Processors/Drawing/FillProcessor{TPixel}.cs	Modified API call syntax from a method call to a property for retrieving image bounds.
src/ImageSharp.Drawing/Processing/Processors/Drawing/FillPathProcessor{TPixel}.cs	Modified API call syntax from a method call to a property for retrieving image bounds.
src/ImageSharp.Drawing/ImageSharp.Drawing.csproj	Updated package versions for SixLabors.Fonts and SixLabors.ImageSharp.
.github/workflows/build-and-test.yml	Updated Ubuntu package installation step via improved condition and added apt-get update.

Comments suppressed due to low confidence (1)

tests/ImageSharp.Drawing.Tests/Drawing/Text/DrawTextOnImageTests.cs:272

• The increase in newline repetitions from 31 to 61 should be confirmed against the intended text output. Ensure that all related test expectations and baselines are updated to reflect this change.

string newLines = Repeat("\r\n", 61);