config: Use the correct openSUSE Backports key for Leap 15.5

The openSUSE Backports signing key was replaced in May for Leap 15.5,
so this configuration needs to be updated for the new key.

mock-core-configs/etc/mock/templates/opensuse-leap-15.5.tpl

@@ -53,7 +53,7 @@ baseurl=https://download.opensuse.org/distribution/leap/$releasever/repo/oss/
 #metalink=https://download.opensuse.org/distribution/leap/$releasever/repo/oss/repodata/repomd.xml.metalink
 enabled=1
 gpgkey=file:///usr/share/distribution-gpg-keys/opensuse/RPM-GPG-KEY-openSUSE-2022
-        file:///usr/share/distribution-gpg-keys/opensuse/RPM-GPG-KEY-openSUSE-Backports
+        file:///usr/share/distribution-gpg-keys/opensuse/RPM-GPG-KEY-openSUSE-Backports-2023
         file:///usr/share/distribution-gpg-keys/suse/RPM-GPG-KEY-SuSE-SLE-15
         file:///usr/share/distribution-gpg-keys/suse/RPM-GPG-KEY-SuSE-SLE-Main-2023
 gpgcheck=1
@@ -79,7 +79,7 @@ name=openSUSE Leap $releasever - {{ target_arch }} - Updates from Backports for
 baseurl=https://download.opensuse.org/update/leap/$releasever/backports/
 #metalink=https://download.opensuse.org/update/leap/$releasever/backports/repodata/repomd.xml.metalink
 enabled=1
-gpgkey=file:///usr/share/distribution-gpg-keys/opensuse/RPM-GPG-KEY-openSUSE-Backports
+gpgkey=file:///usr/share/distribution-gpg-keys/opensuse/RPM-GPG-KEY-openSUSE-Backports-2023
 gpgcheck=1
 
 """

mock-core-configs/mock-core-configs.spec

@@ -22,7 +22,7 @@ BuildArch:  noarch
 Provides: mock-configs
 
 # distribution-gpg-keys contains GPG keys used by mock configs
-Requires:   distribution-gpg-keys >= 1.96
+Requires:   distribution-gpg-keys >= 1.98
 # specify minimal compatible version of mock
 Requires:   mock >= 5.0
 Requires:   mock-filesystem

releng/release-notes-next/leap15.5-gpgkeys.config

@@ -0,0 +1,2 @@
+The set of GPG keys used for openSUSE Leap 15.5 was updated to include
+the correct key used for the openSUSE Backports repository.