gnunet: update to v0.23.1

gnunet: update to v0.23.1

v0.23.0 (tagged as v0.23.1)
  - Add GNUNET_CONFIGURATION_set_value_float
  - util: Float configuration values are no longer locale-dependent, but instead must always be in LC_NUMERIC=C format
  - GNUNET_DISK_internal_file_handle_ changed to always return int
  - Reworkd ProjectData handling; Now required as input for various API calls.

v0.22.2:
  - GNUNET_STRINGS_get_utf8_args removed.
  - Removed unsafe and unused functions for 2d/3d array allocation.

v0.22.1:
  - Update HELLO files for new bootstrap peer
  - Fix regression in DHT Bloom filter
  - Fix long-standing regression in HELLO URI expirations

v0.22.0:
  - New logging API to print/parse hex bytes
  - Added RFC9180 HPKE and associated KEMs
  - Replace oneshot PKE and KEM APIs with HPKE
  - New Elligator KEM
  - Namestore API allows multiple records to be inserted in a single transaction (if plugin supports this)
  - New ECDH API that uses KDFs instead of hash
  - Renamed GNUNET_CRYPTO_hkdf to GNUNET_CRYPTO_hkdf_gnunet
  - Added new standard SHA256-based HKDF APIs
  - New hostlist bootstrap domain https://bootstrap.gnunet.org

Signed-off-by: Daniel Golle <daniel@makrotopia.org>