doc: Fix config-schema.json's URL

The old URL returns 404.

Signed-off-by: Felix Yan <[email protected]>

Documentation/nvme-config.txt

@@ -36,7 +36,7 @@ DESCRIPTION
 Read in the NVMe over Fabrics configuration from the specified JSON
 configuration file and allow to update or modify the contents.
 The JSON configuration file format is documented in
-https://github.com/linux-nvme/libnvme/doc/config-schema.json
+https://github.com/linux-nvme/libnvme/blob/master/doc/config-schema.json
 
 OPTIONS
 -------
@@ -202,7 +202,7 @@ SEE ALSO
 --------
 nvme-discover(1)
 nvme-connect(1)
-https://github.com/linux-nvme/libnvme/doc/config-schema.json
+https://github.com/linux-nvme/libnvme/blob/master/doc/config-schema.json
 
 AUTHORS
 -------

Documentation/nvme-connect-all.txt

@@ -127,7 +127,7 @@ OPTIONS
 	default @SYSCONFDIR@/nvme/config.json file or 'none' to not read in
 	an existing configuration file. The JSON configuration file
 	format is documented in
-	https://github.com/linux-nvme/libnvme/doc/config-schema.json
+	https://github.com/linux-nvme/libnvme/blob/master/doc/config-schema.json
 
 -k <#>::
 --keep-alive-tmo=<#>::

Documentation/nvme-connect.txt

@@ -101,7 +101,7 @@ OPTIONS
 	default @SYSCONFDIR@/nvme/config.json file or 'none' to not read in
 	an existing configuration file. The JSON configuration file
 	format is documented in
-	https://github.com/linux-nvme/libnvme/doc/config-schema.json
+	https://github.com/linux-nvme/libnvme/blob/master/doc/config-schema.json
 
 -S <secret>::
 --dhchap-secret=<secret>::

Documentation/nvme-discover.txt

@@ -146,7 +146,7 @@ OPTIONS
 	default @SYSCONFDIR@/nvme/config.json file or 'none' to not read in
 	an existing configuration file. The JSON configuration file
 	format is documented in
-	https://github.com/linux-nvme/libnvme/doc/config-schema.json
+	https://github.com/linux-nvme/libnvme/blob/master/doc/config-schema.json
 
 -k <#>::
 --keep-alive-tmo=<#>::