improve the git describe command

- When using the [action versioning recommendations](https://github.com/actions/toolkit/blob/master/docs/action-versioning.md#recommendations), a commit can have duplicate tags (v2, v2.1.2).
- The previous implementation did not take that into consideration.
- With this new implementation, v2.1.2 is returned even when v2 is the newer commit tag (which is usually the case).
- Also, when running this script from another branch (let's say 'releases/v1'), the previous implementation would return newer tags in other branches.
- NOTE: This new implementation only searches for annotated tags.

Author: plbstl

script/release

@@ -20,6 +20,7 @@
 
 # Variables
 tag_regex='v[0-9]+\.[0-9]+\.[0-9]+$'
+tag_glob='v[0-9].[0-9].[0-9]*'
 
 # Terminal colors
 OFF='\033[0m'
@@ -28,7 +29,7 @@ GREEN='\033[0;32m'
 BLUE='\033[0;34m'
 
 # Get the latest release tag
-latest_tag=$(git describe --tags "$(git rev-list --tags --max-count=1)")
+latest_tag=$(git describe --abbrev=0 --match="$tag_glob")
 
 if [[ -z "$latest_tag" ]]; then
 	# There are no existing release tags