[docs/hugo] Move to hugo version 0.82.0
[docs/hugo] Move to hugo version 0.82.0

When adding more pinmux signals and pads, we run into a
funny error where HUGO can't read the generated pinmux register
documentation anymore since the file is too big. This file
limitation has just recently (3 months ago) been removed.

See https://github.com/gohugoio/hugo/pull/8172 for reference.

This commit moves to HUGO 0.82.0 which contains this fix.

Signed-off-by: Michael Schaffner <a005a2d3342a687ea2d05360c953107acbe83e08@opentitan.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan