Fix incorrect build from source path in README.md and druid repo url. (…

…apache#8531)

CONTRIBUTING.md

@@ -51,7 +51,7 @@ You can find more developers' resources in [`dev/`](dev) directory.
 1. Clone your fork of the GitHub repository
 
     ```sh
-    git clone [email protected]:<username>/druid.git
+    git clone [email protected]:<username>/incubator-druid.git
     ```
 
     replace `<username>` with your GitHub username.
@@ -100,7 +100,7 @@ You can find more developers' resources in [`dev/`](dev) directory.
     Go to your Druid fork main page
 
     ```
-    https://github.com/<username>/druid
+    https://github.com/<username>/incubator-druid
     ```
 
     If you recently pushed your changes GitHub will automatically pop up a

README.md

@@ -58,7 +58,7 @@ Some committers and users are present in the channel `#druid` on the Apache Slac
 
 Please note that JDK 8 is required to build Druid.
 
-For instructions on building Druid from source, see [docs/content/development/build.md](docs/content/development/build.md)
+For instructions on building Druid from source, see [docs/development/build.md](docs/development/build.md)
 
 ### Contributing