package/timescaledb: add TIMESCALEDB_CPE_ID_VENDOR

cpe:2.3:a:timescale:timescaledb is a valid CPE identifier for this
package:

  https://nvd.nist.gov/products/cpe/search/results?namingFormat=2.3&keyword=cpe%3A2.3%3Aa%3Atimescale%3Atimescaledb

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/timescaledb/timescaledb.mk

@@ -8,6 +8,7 @@ TIMESCALEDB_VERSION = 2.8.0
 TIMESCALEDB_SITE = $(call github,timescale,timescaledb,$(TIMESCALEDB_VERSION))
 TIMESCALEDB_LICENSE = Apache-2.0
 TIMESCALEDB_LICENSE_FILES = LICENSE
+TIMESCALEDB_CPE_ID_VENDOR = timescale
 
 TIMESCALEDB_DEPENDENCIES = postgresql