Improve the check-release tag parser to be more robust

`check-release.yml` used to parse the `GITHUB_REF` with `tr -d 'refs/tags/v'`. But, `tr` deletes characters and not a specific string.
Which results in a wrong parsing of tags containings the characters present in `refs/tags/v`.
Example: 
  `refs/tags/v0.1.0-strapi-v3.1` becomes `0.1.0-pi-v3.1`

To avoid this issue, the command is changed to a more robust parsing method: `cut -d '/' -f 3 | sed -r 's/^v//'`
- `cut -d '/' -f 3` splits our string based on the `/` and takes the 3th element.
  `refs/tags/v0.1.0-strapi-v3.1` => `["refs", "tags", "v0.1.0-strapi-v3.1"]`
- `sed -r 's/^v//'` removes the prepending `v`.
  `v0.1.0-strapi-v3.1` => `0.1.0-strapi-v3.1`

Author: bidoubiwa

.github/scripts/check-release.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 # Checking if current tag matches the package version
-current_tag=$(echo $GITHUB_REF | cut -d '/' -f 3 | tr -d ' ',v)
+current_tag=$(echo $GITHUB_REF | cut -d '/' -f 3 | sed -r 's/^v//')
 
 package_json_version=$(grep '"version":' package.json | cut -d ':' -f 2- | tr -d ' ' | tr -d '"' | tr -d ',')
 if [ "$current_tag" != "$package_json_version" ]; then