Fix bad links

Author: AArnott

doc/cake.md

@@ -1,5 +1,5 @@
 # Cake Build
-Add `#addin Cake.GitVersioning` to the top of your Cake Build script.  See [here](Cake/GitVersioning/GitVersioningAliases.md) for usage.  See [here](Nerdbank/GitVersioning/VersionOracle.md) for the VersionOracle usage.
+Add `#addin Cake.GitVersioning` to the top of your Cake Build script.  See [here](https://github.com/AArnott/Nerdbank.GitVersioning/wiki/GitVersioningAliases) for usage.  See [here](https://github.com/AArnott/Nerdbank.GitVersioning/wiki/VersionOracle) for the VersionOracle usage.
 
 ## Example
 ~~~~csharp
@@ -8,4 +8,4 @@ Task("GetVersion")
 {
     Information(GetVersioningGetVersion().SemVer2)
 });
-~~~~
+~~~~