[codespell] fix typos

This change fixes typos in tempest code, doc, zuul yaml
and tox.ini file, which are found by codespell.

Change-Id: I8051d979e28f7dbf532181f339cbef9cd7220c76
diff --git a/roles/run-tempest/tasks/main.yaml b/roles/run-tempest/tasks/main.yaml
index 3d78557..2dd708a 100644
--- a/roles/run-tempest/tasks/main.yaml
+++ b/roles/run-tempest/tasks/main.yaml
@@ -80,7 +80,7 @@
 
 - name: Tempest 26.1.0 workaround to fallback exclude-list to blacklist
   # NOTE(gmann): stable/train|ussuri|victoria use Tempest 26.1.0 and with
-  # stestr 2.5.1/3.0.1 (beacause of upper constraints of stestr 2.5.1/3.0.1
+  # stestr 2.5.1/3.0.1 (because of upper constraints of stestr 2.5.1/3.0.1
   # in stable/train|ussuri|victoria) which does not have new args exclude-list
   # so let's fallback to old arg if new arg is passed.
   set_fact:
@@ -109,7 +109,7 @@
 
 - name: Tempest 26.1.0 workaround to fallback exclude-regex to black-regex
   # NOTE(gmann): stable/train|ussuri|victoria use Tempest 26.1.0 and with stestr
-  # 2.5.1/3.0.1 (beacause of upper constraints of stestr 2.5.1/3.0.1 in
+  # 2.5.1/3.0.1 (because of upper constraints of stestr 2.5.1/3.0.1 in
   # stable/train|ussuri|victoria) which does not have new args exclude-list so
   # let's fallback to old arg if new arg is passed.
   set_fact: