fix: MPDG -> MPGD

[wdconinc]

Briefly, what does this PR introduce?

This PR renames an input hit collection. Not as important since this isn't in craterlake, but code gets copied...

What kind of change does this PR introduce?

• Bug fix (issue: incorrect hit collection name)
• New feature (issue #__)
• Documentation update
• Other: __

Please check if this PR fulfills the following:

• Tests for the changes have been added
• Documentation has been added / updated
• Changes have been communicated to collaborators @mposik1983

Does this PR introduce breaking changes? What changes might users need to make to their code?

No.

Does this PR change default behavior?

No.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

Capybara summary for PR 1562

• rec_dis_10x100_minQ2=0_craterlake
• rec_dis_10x100_minQ2=1000_craterlake_tracking_only
• rec_dis_18x275_minQ2=0_craterlake
• rec_dis_18x275_minQ2=1000_craterlake
• rec_dis_5x41_minQ2=0_craterlake
• rec_e_1GeV_20GeV_craterlake
• rec_pi_1GeV_20GeV_craterlake
  ^{_{Last updated 2024-08-09T00:14-04:00 8b61be1}}

[mposik1983]

This hit collection is left over from the arches configuration. These can be removed as they are no longer used.

[ruse-traveler]

LGTM!