fix(*) allow RC tags in the release tagging script

[jpeach]

Summary

Update the release tagging script to allow an optional qualifier string
after a hyphen.

Full changelog

N/A

Issues resolved

N/A

Documentation

N/A

Testing

$ ./tools/releases/make-release-tag.sh 1.2.0 v9.9.0-rc1
Created tag 'v9.9.0-rc1'.
Testing whether tag 'v9.9.0-rc1' can be pushed.
To github.com:kumahq/kuma.git
 * [new tag]           v9.9.0-rc1 -> v9.9.0-rc1
Run 'git push origin v9.9.0-rc1' to push the tag if you are happy.

$ git show v9.9.0-rc1 | head
tag v9.9.0-rc1
Tagger: James Peach <james.peach@konghq.com>
Date:   Tue Jun 29 07:56:15 2021 +1000

Tag v9.9.0-rc1 release.

Bart Smykla (4):
      chore(kuma-cp) new version of gui (#2187)
      fix(kuma-cp) supported versions fix (#2193)
      chore(kuma-cp) new gui version (#2219)

[codecov-commenter]

Codecov Report

Merging #2241 (800effd) into master (3ee310d) will increase coverage by 0.29%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2241      +/-   ##
==========================================
+ Coverage   51.75%   52.04%   +0.29%     
==========================================
  Files         909      913       +4     
  Lines       41000    41036      +36     
==========================================
+ Hits        21218    21356     +138     
+ Misses      17745    17621     -124     
- Partials     2037     2059      +22     

Impacted Files	Coverage Δ
pkg/core/resources/manager/cache.go	80.28% <0.00%> (ø)
...k8s/native/controllers/proxytemplate_controller.go	0.00% <0.00%> (ø)
api/internal/util/proto/proto.go	62.50% <0.00%> (ø)
...kg/plugins/resources/k8s/native/pkg/test/within.go	100.00% <0.00%> (ø)
api/internal/util/proto/types.go	50.00% <0.00%> (ø)
api/observability/v1/mads.pb.go	35.94% <0.00%> (+1.30%)	⬆️
pkg/xds/generator/direct_access_proxy_generator.go	81.57% <0.00%> (+1.31%)	⬆️
api/mesh/v1alpha1/dataplane_helpers.go	78.08% <0.00%> (+1.68%)	⬆️
api/mesh/v1alpha1/dataplane_insight_helpers.go	79.22% <0.00%> (+2.59%)	⬆️
pkg/mads/v1/client/client.go	43.66% <0.00%> (+2.81%)	⬆️
... and 12 more

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[jpeach]

@lobkovilya Updated and ready for review :)