[TASK] Raise typo3/testing-framework ^6.8.0

Brings an error/exception handler improvement for
acceptance tests.

composer req --dev typo3/testing-framework:^6.8.0

Resolves: #93735
Releases: master, 10.4
Change-Id: I9d6aff03cd811c36d73959191b946d493ece7572
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/68385
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>

composer.json

@@ -94,7 +94,7 @@
 		"phpstan/phpstan": "^0.12.64",
 		"phpunit/phpunit": "^8.5.13",
 		"typo3/cms-styleguide": "~10.0.4",
-		"typo3/testing-framework": "^6.6.2"
+		"typo3/testing-framework": "^6.8.0"
 	},
 	"suggest": {
 		"ext-gd": "GDlib/Freetype is required for building images with text (GIFBUILDER) and can also be used to scale images",

typo3/sysext/core/composer.json

@@ -72,7 +72,7 @@
 		"phpspec/prophecy": "^1.12.2",
 		"phpstan/phpstan": "^0.12.64",
 		"typo3/cms-styleguide": "~10.0.4",
-		"typo3/testing-framework": "^6.6.2"
+		"typo3/testing-framework": "^6.8.0"
 	},
 	"suggest": {
 		"ext-fileinfo": "Used for proper file type detection in the file abstraction layer",