Auto merge of #7334 - matthiaskrgr:ch_doc, r=alexcrichton

doc: capitalization change for consistency.

Author: bors

src/doc/src/SUMMARY.md

@@ -15,7 +15,7 @@
     * [Cargo.toml vs Cargo.lock](guide/cargo-toml-vs-cargo-lock.md)
     * [Tests](guide/tests.md)
     * [Continuous Integration](guide/continuous-integration.md)
-    * [Cargo home](guide/cargo-home.md)
+    * [Cargo Home](guide/cargo-home.md)
     * [Build Cache](guide/build-cache.md)
 
 * [Cargo Reference](reference/index.md)