doc(ottl): remove extraneous characters

Author: wbh1

.chloggen/feat_ottl-now.yaml

@@ -7,7 +7,7 @@ change_type: 'enhancement'
 component: 'pkg/ottl'
 
 # A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
-note: "Add a Now() function to ottl that returns the current system time ()"
+note: "Add a Now() function to ottl that returns the current system time"
 
 # Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
 issues: [27038, 26507]