fix links to devfile 2.2.0 spec

[kadel]

What type of PR is this:

/kind bug

For documentation, add the following label:
/area documentation

What does this PR do / why we need it:

When devfile 2.2.0 spec was promoted from alpha stage, the page with alpha spec was removed

This updates all links to 2.2.0-alpha and points to the 2.2.0

Which issue(s) this PR fixes:

Fixes #

PR acceptance criteria:

• Unit test

• Integration test

• Documentation

How to test changes / Special notes to the reviewer:

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
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0.0% Duplication

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[rm3l]

/override windows-integration-test/Windows-test

odo logs tests seem flaky, as reported in #6619.
Overriding because this is a doc-only PR.

[openshift-ci]

@rm3l: Overrode contexts on behalf of rm3l: windows-integration-test/Windows-test

In response to this:

/override windows-integration-test/Windows-test

odo logs tests seem flaky, as reported in #6619.
Overriding because this is a doc-only PR.

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