More consistency for Vale style files

doc/.vale/gitlab/CurrentStatus.yml

 ---
 # Suggestion: gitlab.CurrentStatus
+#
 # Checks for words that indicate a product or feature may change in the future.
 #
 # For a list of all options, see https://errata-ai.gitbook.io/vale/getting-started/styles

doc/.vale/gitlab/SentenceSpacing.yml

 ---
 # Error: gitlab.SentenceSpacing
 #
-# Check for the following in common content scenarios:
+# Checks for the following in common content scenarios:
 #
 # - No spaces.
 # - More than one space.