Jetpack: lossless image optimization, part 3 (#38750)

Lossless image optimization of Jetpack images.

This is a continuation of #38398 and #38573. Please see #38398 for more context and details.

This finishes this series of commits. All images except for projects/js-packages/connection/components/disconnect-dialog/images/disconnect-thanks.jpg have been optimized. See @anomiex's debugging of the problem in Automattic/jetpack#38750 (review) for more info on why that image was skipped.

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/10458732981

Upstream-Ref: Automattic/jetpack@8510521

CHANGELOG.md

@@ -1,3 +1,10 @@
+## [3.1.5-alpha] - unreleased
+
+This is an alpha version! The changes listed here are not final.
+
+### Fixed
+- Lossless image optimization for images (should improve performance with no visible changes).
+
 ## [3.1.4] - 2024-08-15
 ### Changed
 - Updated package dependencies. [#38665]
@@ -137,6 +144,7 @@
 
 - Build: Refactored (aligned build system with Gridicons).
 
+[3.1.5-alpha]: https://github.com/Automattic/social-logos/compare/v3.1.4...v3.1.5-alpha
 [3.1.4]: https://github.com/Automattic/social-logos/compare/v3.1.3...v3.1.4
 [3.1.3]: https://github.com/Automattic/social-logos/compare/v3.1.2...v3.1.3
 [3.1.2]: https://github.com/Automattic/social-logos/compare/v3.1.1...v3.1.2

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "social-logos",
-	"version": "3.1.4",
+	"version": "3.1.5-alpha",
 	"description": "A repository of all the social logos used on WordPress.com.",
 	"homepage": "https://github.com/Automattic/jetpack/tree/HEAD/projects/js-packages/social-logos/",
 	"bugs": {