Update github-workflow.json

[LeonardLaszlo]

/ character should be escaped in regular expressions

Closes #000

Types of changes

• [ x ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Motivation

Why is this change required? What problem does it solve? It fixes a syntax error in Itellij Idea when the path to an action is in the following format: ./path/to/localfile.yml

Changes

Behaviour, Functionality, Screenshots, etc.

Try to match the previous regexp ( ^(.+/)+(.+).(ya?ml)(@.+)?$ ) against a valid input ( ./path/to/localfile.yml ) here: https://regex101.com/

Success Check

How can we see or measure the change?

Use the example above on https://regex101.com/

[YunaBraska]

Hey @LeonardLaszlo thanks for creating a PR. These schema files are coming from https://json.schemastore.org/github-workflow.json Probably you can also solve this globally there

[LeonardLaszlo]

Done here: https://github.com/SchemaStore/schemastore/pull/3943

[YunaBraska]

Next version with your change is published and will be available as soon as it's approved (usually takes 1 day). Thanks for the contribution.