Fix #4568: Correct MPL-2.0 badge rule to prevent false positives on I…

[saransh-2504]

Fixes #4568

What was wrong

ScanCode identified MPL-2.0 in README.md of dnspython v2.6.1 due to an overly broad
MPL badge rule (mpl-2.0_url_badge.RULE). The rule matched non-MPL badges such as
the ISC license badge, causing a false-positive detection.

What I did

• Updated the MPL-2.0 badge rule to use explicit MPL-only references
• Removed overly generic matching patterns that overlapped with ISC badges
• Ensured the rule only matches intentional MPL-2.0 badge text

Testing

• Manually verified using dnspython v2.6.1: MPL-2.0 is no longer detected
• ISC badge detection remains correct
• MPL-related rule tests (pytest -k "mpl") pass

[saransh-2504]

Hi! This PR fixes the badge false detection issue #4568.
Please review it @JustinWonjaePark

[saransh-2504]

Hi,
I have fixed the issue and raised a PR.
So i request you to kindly check it once and merge this.
Thank You,
@saransh-2504

[JustinWonjaePark]

@saransh-2504
Hi, thanks for looking into the issue.
(and sorry for the late response! I've missed your mention!)
It looks good to me, but I don't have privilege to merge.