refactor: APPS-2727 Clean URL for CollectionsExplore

[tinuola]

Connected to APPS-2727

Page(s) updated:

• /collections/explore/index.vue

Preview:

• https://deploy-preview-826--uclalibrary-test-nuxt3x.netlify.app/collections/explore

Checklist:

• [x] I added github label for semantic versioning
• [x] I requested a PR review
• [ ] I double checked it looks like the designs
• [ ] I completed any required mobile breakpoint styling
• [ ] I completed any required hover state styling
• [ ] I included a working spec file
• [ ] I added notes above about how long it took to build this component
• [ ] UX has reviewed this PR

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