Reported rule URLs refer to `develop` branch instead of corresponding tagged release

[stefan6419846]

Description

In the generated YAML report, the rule URL refers to the develop branch instead of the tagged release if used from a release.

How To Reproduce

Running scancode -l --license-text setup.py --info --url --copyright --yaml setup.yaml on a file generates a YAML report which includes

rule_url: https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/rules/apache-2.0_1251.RULE

This is misleading as the rule might have changed when the report has been generated with an older ScanCode Toolkit version or even deleted, thus making the reference more or less obsolete/fragile.

System configuration

• What OS are you running on? Linux
• What version of scancode-toolkit was used to generate the scan file? 32.1.0
• What installation method was used to install/run scancode? pip

[pombredanne]

@stefan6419846 good point!
We have since then evolved a rule to deprecate but never delete or repurpose existing rules.
But pointing to a specific tag or commit would be a good thing.