docs(plugins/reactions): fix spelling issue (lowlighter#585)

Author: jayvdb

source/plugins/reactions/README.md

@@ -19,8 +19,8 @@ The *reactions* plugin displays overall reactions on your recent issues and issu
     # ... other options
     plugin_reactions: yes
     plugin_reactions_limit: 200                 # Compute reactions over last 200 issue comments
-    plugin_reactions_limit_issues: 100          # Compute reactions over laste 100 issues/pull requests opened
+    plugin_reactions_limit_issues: 100          # Compute reactions over last 100 issues/pull requests opened
     plugin_reactions_days: 14                   # Compute reactions on issue comments posted less than 14 days ago
     plugin_reactions_details: count, percentage # Display reactions count and percentage
     plugin_reactions_ignored: bot               # Ignore "bot" user
-```
+```