Promote GA Pipeline - Ignore Whitespaces in Bump Check

[ralikio]

The following fragment of promote-keb-to-dev.yaml checks if version bump in management-plane-charts resulted in expected number of changes. However, the diff command used in the step outputs any whitespace modifications which fails the step in case of formatting changes.

kyma-environment-broker/.github/workflows/promote-keb-to-dev.yaml

Lines 92 to 100 in 4f455c0

	- name: Check changes
	working-directory: management-plane-charts
	run: |
	changes=$(git diff --shortstat)
	echo "$changes"
	if [[ "$changes" != *"3 insertions(+), 3 deletions(-)"* ]]; then
	echo "Expected 3 insertions and 3 deletions, but found different changes."
	exit 1
	fi

Consider usage of ignore-all-space flag in this step.