Update golang Docker tag to v1.26 #357

Job	Run time
shared-operator-workflow / setup	3s
shared-operator-workflow / package-helm	-1s
shared-operator-workflow / test-helmchart	-1s
shared-operator-workflow / test-operator	-1s
shared-operator-workflow / build-operator	-1s
shared-operator-workflow / build-bundle	-1s
	-2s

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