Remove period for ExtensionManifestV2Availability policy caption

Caption is not a sentence, no period is needed.

Change-Id: I3ccee0d5f56094ac6ea5375a6fc123a8cfabb125
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4034470
Reviewed-by: Igor Ruvinov <igorruvinov@chromium.org>
Commit-Queue: Igor Ruvinov <igorruvinov@chromium.org>
Auto-Submit: Owen Min <zmin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1072963}
diff --git a/components/policy/resources/templates/policy_definitions/Extensions/ExtensionManifestV2Availability.yaml b/components/policy/resources/templates/policy_definitions/Extensions/ExtensionManifestV2Availability.yaml
index 0b08ef66..1933fc0 100644
--- a/components/policy/resources/templates/policy_definitions/Extensions/ExtensionManifestV2Availability.yaml
+++ b/components/policy/resources/templates/policy_definitions/Extensions/ExtensionManifestV2Availability.yaml
@@ -1,7 +1,7 @@
 owners:
 - zmin@chromium.org
 - file://components/policy/OWNERS
-caption: Control manifest v2 extension availability.
+caption: Control manifest v2 extension availability
 desc: |-
   Control if manifest v2 extensions can be used by browser.