Fix inconsistent docs for mbedtls_sha3_finish and mbedtls_sha3 olen

Change the documentation of mbedtls_sha3_finish() and mbedtls_sha3()
to state that olen must be at least the digest size (28, 32, 48, or 64
for SHA3-224/256/384/512) rather than must equal it.

The implementation accepts olen larger than the digest size — it
silently writes the digest and ignores the excess. The previous docs
incorrectly suggested that olen larger than the digest size would be
an error.

Fixes #10844

Signed-off-by: AaryanCdry <AaryanCdry@users.noreply.github.com>

Author: AaryanCdry

include/mbedtls/sha3.h

@@ -118,7 +118,7 @@ int mbedtls_sha3_update(mbedtls_sha3_context *ctx,
  * \param output   The SHA-3 checksum result.
  *                 This must be a writable buffer of length \c olen bytes.
  * \param olen     Defines the length of output buffer (in bytes). For SHA-3 224, SHA-3 256,
- *                 SHA-3 384 and SHA-3 512 \c olen must equal to 28, 32, 48 and 64,
+ *                 SHA-3 384 and SHA-3 512 \c olen must be at least 28, 32, 48 and 64,
  *                 respectively.
  *
  * \return         \c 0 on success.
@@ -144,7 +144,7 @@ int mbedtls_sha3_finish(mbedtls_sha3_context *ctx,
  * \param output   The SHA-3 checksum result.
  *                 This must be a writable buffer of length \c olen bytes.
  * \param olen     Defines the length of output buffer (in bytes). For SHA-3 224, SHA-3 256,
- *                 SHA-3 384 and SHA-3 512 \c olen must equal to 28, 32, 48 and 64,
+ *                 SHA-3 384 and SHA-3 512 \c olen must be at least 28, 32, 48 and 64,
  *                 respectively.
  *
  * \return         \c 0 on success.