Bump core/cache_subsystem/hpdcache from `25ffa34` to `b4519e7`

Created by: dependabot[bot]

Bumps core/cache_subsystem/hpdcache from 25ffa34 to b4519e7.

Commits

• b4519e7 Add new technical paper in README
• f5b00c6 Update the documentation section of the README
• afd6342 Update the changelog file
• 433011f New HPDcache User Guide in reStructuredText format
• 96aed4f Fix warning in fifo_reg
• fbc1000 Remove typedefs inside generate statements (not supported by SVASE)
• 9698776 Fix concurrent set of inval_check and refill_sel_victim signals
• 4d2b282 Add < target to lint check makefile
• 27f069b fix: syntax of the Verible action script (#24)
• 6cb20d5 Relocate the lint folder (#23)
• Additional commits viewable in compare view

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