package/catch2: bump version to 3.8.1

- Fixed bug where catch_discover_tests fails when no TEST_CASEs are present

release notes: https://github.com/catchorg/Catch2/releases/tag/v3.8.1

Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
[Peter: reword commit message]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/catch2/catch2.hash

@@ -1,3 +1,3 @@
 # Locally computed:
-sha256  1ab2de20460d4641553addfdfe6acd4109d871d5531f8f519a52ea4926303087  catch2-3.8.0.tar.gz
+sha256  18b3f70ac80fccc340d8c6ff0f339b2ae64944782f8d2fca2bd705cf47cadb79  catch2-3.8.1.tar.gz
 sha256  c9bff75738922193e67fa726fa225535870d2aa1059f91452c411736284ad566  LICENSE.txt

package/catch2/catch2.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-CATCH2_VERSION = 3.8.0
+CATCH2_VERSION = 3.8.1
 CATCH2_SITE = $(call github,catchorg,Catch2,v$(CATCH2_VERSION))
 CATCH2_INSTALL_STAGING = YES
 CATCH2_INSTALL_TARGET = NO