[CI] Ignore mission-vision-values.md until it is fixed (#3390)

.prettierignore

@@ -13,5 +13,7 @@
 /content-modules/*
 !/content-modules/community
 /content-modules/community/*
-!/content-modules/community/mission-vision-values.md
+# Temporary until the following is merged and integrated into this repo:
+#   https://github.com/open-telemetry/community/pull/1742
+# !/content-modules/community/mission-vision-values.md
 !/content-modules/community/roadmap.md