fix(autopatch): restore AlmaLinux el8 portablesuffix override

almalinux-release defines the %centos macro (%centos %{major}), so the
upstream spec's `%if 0%{?centos} == 0` test treats AlmaLinux as CentOS
and sets portablesuffix to el9. AlmaLinux must consume the el8 portable
packages (like RHEL), so the previous action was NOT obsolete — dropping
it left the "Set portablesuffix to el8" changelog with nothing setting it.

Re-add the `%if 0%{?almalinux}` -> el8 override, anchored on the stable
`%global portablebuilddir /builddir/build/BUILD` line (matching the a10s
and a10 branch configs) instead of the fragile portablesuffix/%endif anchor.

config.yaml

@@ -1,4 +1,15 @@
 actions:
+  - replace:
+      - target: "spec"
+        find: "%global portablebuilddir /builddir/build/BUILD"
+        replace: |
+              %global portablebuilddir /builddir/build/BUILD
+
+              %if 0%{?almalinux}
+              %global portablesuffix el8
+              %endif
+        count: 1
+
   - modify_release:
     - suffix: ".alma.1"
       enabled: true