Docs: Update actions update to include bio verification

doc/Actions/key_generation.adoc

@@ -18,9 +18,10 @@ authentication, which is done by providing the management key. If no management
 is provided, the tool will try to authenticate using the default management key.footnote:[It is strongly recommended to
 change the Yubikey's PIN, PUK and management key before start using it]
 
-While generating the certificate/certificate request does not require authentication,
-it does require verifying the PIN code, which has to be done in an action that must
-take place before the generation action, otherwise the operation will fail.
+While generating the certificate/certificate request does not require authentication, the signing operation does
+require verifying the PIN code or the fingerprint if the YubiKey supports Bio verification, which has to be done in an
+action that must take place before the signing action, otherwise the operation will fail. Use `-a verify-pin` to
+verify the PIN and `-a verify-bio` for fingerprint verification.
 
 === Parameters
 

doc/Actions/signing.adoc

@@ -4,7 +4,8 @@
 === Description
 Signs input data
 
-The signing operation requires verifying the PIN code, which is done using the "verify-pin" action
+The signing operation requires verifying the PIN code or the fingerprint if the YubiKey supports Bio verification.
+Use `-a verify-pin` to verify the PIN and `-a verify-bio` for fingerprint verification.
 
 === Parameters
 

doc/Actions/test-decryption.adoc

@@ -5,9 +5,9 @@
 === Description
 Tests decryption function.
 
-"test-signature" and "test-decipher" are actions that require verifying the PIN code,
-which has to be done in an action that must take place before the generation action,
-otherwise the tests will fail.
+`test-signature` and `test-decipher` are actions that require verifying the PIN code or the fingerprint if the YubiKey
+supports Bio verification, which has to be done in an action that must take place before the generation action,
+otherwise the tests will fail. Use `-a verify-pin` to verify the PIN and `-a verify-bio` for fingerprint verification.
 
 Performing the test will require the certificate stored on the slot to test. This is
 done using the "read-certificate" action first.

doc/Actions/test-signature.adoc

@@ -5,9 +5,9 @@
 === Description
 Tests signing functions.
 
-"test-signature" and "test-decipher" are actions that require verifying the PIN code,
-which has to be done in an action that must take place before the generation action,
-otherwise the tests will fail.
+`test-signature` and `test-decipher` are actions that require verifying the PIN code or the fingerprint if the YubiKey
+supports Bio verification, which has to be done in an action that must take place before the generation action,
+otherwise the tests will fail. Use `-a verify-pin` to verify the PIN and `-a verify-bio` for fingerprint verification.
 
 Performing the test will require the certificate stored on the slot to test. This is
 done using the "read-certificate" action first.