build(deps): bump github.com/containerd/containerd from 1.6.12 to 1.6.26 in /tools/invoker #986

Job	Run time
Build and push all images (fibonacci-go, fibonacciGo)	4m 33s
Build and push all images (fibonacci-python, fibonacciPython)	2m 6s
Build and push all images (fibonacci-nodejs, fibonacciNodeJS)	1m 34s
Test Knative Deployment (fibonacci-go)	1m 54s
Test Docker Compose (fibonacci-go)	1m 9s
Test Knative Deployment (fibonacci-python)	2m 12s
Test Docker Compose (fibonacci-python)	1m 12s
Test Knative Deployment (fibonacci-nodejs)	2m 10s
Test Docker Compose (fibonacci-nodejs)	1m 13s
Test Knative Deployment (fibonacci-go-tracing)	1m 56s
Test Docker Compose (fibonacci-go-tracing)	1m 20s
Test Knative Deployment (fibonacci-python-tracing)	1m 58s
Test Docker Compose (fibonacci-python-tracing)	1m 11s
Test Knative Deployment (fibonacci-nodejs-tracing)	2m 3s
Test Docker Compose (fibonacci-nodejs-tracing)	1m 14s
	27m 45s

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