package/gtkiostream: fix version

Update GTKIOSTREAM_VERSION to make it compatible with what is returned
by https://release-monitoring.org/project/373420/

Fixes: fab48302865e5c0c98d91b696bc90e75e38189bb

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/gtkiostream/gtkiostream.hash

@@ -1,3 +1,3 @@
 # locally computed hash
-sha256  44e8d921d462005cd330a1c24e5bd8061175b90ae53f537dbf73f59b74f6e01b  gtkiostream-v1.8.0.tar.gz
+sha256  44e8d921d462005cd330a1c24e5bd8061175b90ae53f537dbf73f59b74f6e01b  gtkiostream-1.8.0.tar.gz
 sha256  204d8eff92f95aac4df6c8122bc1505f468f3a901e5a4cc08940e0ede1938994  gpl.txt

package/gtkiostream/gtkiostream.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-GTKIOSTREAM_VERSION = v1.8.0
-GTKIOSTREAM_SITE = $(call github,flatmax,gtkiostream,$(GTKIOSTREAM_VERSION))
+GTKIOSTREAM_VERSION = 1.8.0
+GTKIOSTREAM_SITE = $(call github,flatmax,gtkiostream,v$(GTKIOSTREAM_VERSION))
 GTKIOSTREAM_LICENSE = GPL-2.0+
 GTKIOSTREAM_LICENSE_FILES = gpl.txt