Bump knative.dev/serving from 0.39.3 to 0.40.1

[dependabot[bot]]

Bumps knative.dev/serving from 0.39.3 to 0.40.1.

Commits

• 41769de [release-1.13] Don't drop traffic when upgrading a deployment fails (#14864)
• 1c46c07 upgrade to latest dependencies (#14828)
• 7509f7d Update net-contour nightly (#14827)
• f234d38 Update net-istio nightly (#14826)
• 40b0628 Update net-kourier nightly (#14824)
• 785b9d3 Update net-gateway-api nightly (#14823)
• 232cfd8 Update net-certmanager nightly (#14825)
• 99ea2f3 Update community files (#14822)
• bbabe5b upgrade to latest dependencies (#14816)
• 4928853 Create less load for TestActivatorChainHandlerWithFullDuplex (#14820)
• Additional commits viewable in compare view

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