[packit] 0.28.1 upstream release

Upstream tag: 0.28.1
Upstream commit: a14e6887

plans/main.fmf

@@ -1,6 +1,6 @@
 discover:
     how: fmf
     url: https://github.com/packit/specfile.git
-    ref: cdf06f20715f661b1a5f478320eee2b48c2ba287
+    ref: a14e6887852b6e831e3a0c4f9c4230768f2afc4d
 execute:
     how: tmt

plans/packit-integration.fmf

@@ -2,7 +2,7 @@ discover:
     how: fmf
     url: https://github.com/packit/packit
     filter: tier:0 | tier:1
-    ref: 0048024ec6564008a703140254c4394158b6ed67
+    ref: fe9462574c5e15f02c10cf8f6049a3d6c1671040
 prepare:
   - how: install
     copr: packit/packit-dev

plans/performance.fmf

@@ -9,3 +9,7 @@ prepare:
     script: pip3 install pytest-fail-slow
   - how: shell
     script: curl --output-dir /tmp -O https://src.fedoraproject.org/rpms/texlive/raw/rawhide/f/texlive.spec
+adjust:
+  - when: "initiator != packit"
+    because: "skip this plan on dist-git pull requests"
+    enabled: false