chore(icons): Revert wcag2.1 icon updates (#5107)

* chore(icons): revert icon wcag2.1 color updates

* chore: update icons pkg version

* docs(icons): update icons version in release notes

Author: Amarnath510

RELEASENOTES.general.md

@@ -4,14 +4,13 @@
 ## 2.20.0 - Upcoming
 
 - Updated constant colors codes with global slds hooks
-- Updated background colors for Standard and Actions icons
 - Added two new dependencies for SLDS global styling hooks generation,
   - `@salesforce-ux/sds-styling-aliases` with version `0.2.4`
   - `@salesforce-ux/sds-styling-hooks` with version `1.1.0-alpha.2`
 - Updated `gulp` file to include SLDS global hooks generation as part of build and dist jobs
 - Updated design tokens in every component and utility with SLDS global styling hooks (except Brand-related tokens)
 - Updated CI workflows migrating from CircleCI to GitHub Actions
-- Updated icons to `v10.5.4`
+- Updated icons to `v10.5.5`
   - Standard Set:
     - Added `asset_hierarchy`
     - Added `budget_category_value`

RELEASENOTES.md

@@ -4,14 +4,13 @@
 ## Release 2.20.0 - Upcoming
 
 - Updated constant colors codes with global slds hooks
-- Updated background colors for Standard and Actions icons
 - Added two new dependencies for SLDS global styling hooks generation,
   - `@salesforce-ux/sds-styling-aliases` with version `0.2.4`
   - `@salesforce-ux/sds-styling-hooks` with version `1.1.0-alpha.2`
 - Updated `gulp` file to include SLDS global hooks generation as part of build and dist jobs
 - Updated design tokens in every component and utility with SLDS global styling hooks (except Brand-related tokens)
 - Updated CI workflows migrating from CircleCI to GitHub Actions
-- Updated icons to `v10.5.4`
+- Updated icons to `v10.5.5`
   - Standard Set:
     - Added `asset_hierarchy`
     - Added `budget_category_value`