.cirrus-ci: Update the non-manual GCC build job to GCC 13

Reviewed by:	imp, emaste
Differential Revision:	https://reviews.freebsd.org/D48291

Author: bsdjhb

.cirrus.yml

@@ -131,12 +131,12 @@ task:
       TOOLCHAIN: aarch64-gcc14
       TOOLCHAIN_PKG: ${TOOLCHAIN}
       EXTRA_MAKE_FLAGS: -s
-  - name: amd64-gcc12 World and kernel build and boot smoke test (FreeBSD repo)
+  - name: amd64-gcc13 World and kernel build and boot smoke test (FreeBSD repo)
     only_if: $CIRRUS_REPO_FULL_NAME == 'freebsd/freebsd-src' && $CIRRUS_BRANCH =~ 'pull/.*'
     env:
       TARGET: amd64
       TARGET_ARCH: amd64
-      TOOLCHAIN: amd64-gcc12
+      TOOLCHAIN: amd64-gcc13
       TOOLCHAIN_PKG: ${TOOLCHAIN}
       EXTRA_MAKE_FLAGS: -s
   timeout_in: 120m