fix: change the over time to Over Time in README (#166)

Author: juxianzheng

README.md

@@ -4,11 +4,11 @@ This tool is used to generate contributor graphs across repositories. We use Git
 
 ## Demo
 
-### Contributor over time for single repo
+### Contributor Over Time for single repo
 
 [![Contributor over time](https://contributor-overtime-api.git-contributor.com/contributors-svg?chart=contributorOverTime&repo=apache/apisix)](https://git-contributor.com?chart=contributorOverTime&repo=apache/apisix)
 
-### Contributor over time across related repo
+### Contributor Over Time across related repo
 
 We maintain a [list](api-go/config/multi-repo.yaml) which you could directly add your repo list and commit a PR if needed.
 

src/components/shareDialog/index.js

@@ -204,7 +204,7 @@ const DialogContent = withStyles((theme) => ({
 export const MarkdownLink = ({ params = "", type = "contributorOverTime" }) => {
   const title =
     type === "contributorOverTime"
-      ? "Contributor over time"
+      ? "Contributor Over Time"
       : "Monthly Active Contributors";
 
   const value = `