[FLINK-40383][docs] Reorder Glossary entries alphabetically

[nicusX]

What is the purpose of the change

Glossary page entries have been reordered alphabetically, ignoring the prefix "Flink'

Brief change log

• Reordered existing Glossary entries. No text change. No anchor change

Verifying this change

• Docs only change

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): NO
• The public API, i.e., is any changed class annotated with @Public(Evolving): NO
• The serializers: NO
• The runtime per-record code paths (performance sensitive): NO
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: NO
• The S3 file system connector: NO

Documentation

• Does this pull request introduce a new feature? NO
• If yes, how is the feature documented? N/A

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Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

The PR is human-generated, but I use Claude Code as part of my dev tooling

[flinkbot]

CI report:

• 3612be0 Azure: SUCCESS

Bot commands

The @flinkbot bot supports the following commands:

• @flinkbot run azure re-run the last Azure build

[uros-b]

LGTM