Fix release note generation script

[ddelnano]

Summary: Fix release note generation script

Our releases have blank release notes. This makes it difficult for end users to understand what has changed between releases. This PR updates the existing script that was built to auto generate changelog notes.

Relevant Issues: N/A

Type of change: /kind bug

Test Plan: Ran the script for each artifact type and verified the output was expected

• cli release notes are expected

$ ./scripts/create_release_tag.sh cli -n
$ git tag -l --format='%(contents)' release/cli/v0.9.0-pre-ddelnano-fix-release-note-generation.4
### New Features
- (#2048) Enhanced the `px` cli to detect OpenShift clusters
and prompt to install the appropriate SecurityContextConstraints before
proceeding with a deploy

• vizier release notes are expected

# Needed to modify prev_tag in script since v0.14.13 to main's HEAD doesn't have vizier changelog messages
$ ./scripts/create_release_tag.sh vizier -n
$ git tag -l --format='%(contents)' release/vizier/v0.15.0-pre-main.4
### Bug Fixes
- (#2047) Ensures that the `--stirling_bpf_loop_limit` and
`--stirling_bpf_chunk_limit` values are respected if explicitly provided
on the command line. For 5.1 and later kernels, cli provided values
would have been ignored

• cloud release notes are generated correctly

$ ./scripts/create_release_tag.sh cloud -n
Generating changelog from release/cloud/v0.1.8..release/cloud/v0.2.0-pre-ddelnano-fix-release-note-generation.1

$ git tag -l --format='%(contents)' release/cloud/v0.2.0-pre-ddelnano-fix-release-note-generation.1
### New Features
- (#2043) Add support for rendering differential flamegraphs in
the `StackTraceFlameGraph` display spec
### Bug Fixes
- (#2041) Upgraded bcc and libbpf to support kernels 6.10 and
later

[ddelnano]

@pixie-io/maintainers this is ready for review when you have the chance.