Fix "description:" field for affected jobs

Was written as "Description:" and didn't have effect.

Also, fix typos /e laborate descriptions where applicable.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I92973abdd892fc5d41e42a9ddafbd5d123544450
diff --git a/tf-a-lts-triage-v2.yaml b/tf-a-lts-triage-v2.yaml
index 7d9e912..ea4b707 100644
--- a/tf-a-lts-triage-v2.yaml
+++ b/tf-a-lts-triage-v2.yaml
@@ -5,8 +5,8 @@
     concurrent: true
     disabled: false
     defaults: global
-    Description: |
-      Generat LTS triage report every Friday
+    fescription: |
+      Generate LTS triage report every Friday
     properties:
         - build-discarder:
             days-to-keep: 45