Update README.md

Capitalized two instances of sccache at the start of sentences to match the rest of the README.md

README.md

@@ -15,7 +15,7 @@ Sccache can also be used with local storage instead of remote.
 Build Requirements
 ------------------
 
-sccache is a [Rust](https://www.rust-lang.org/) program. Building it requires `cargo` (and thus `rustc`). sccache currently requires **Rust 1.19**.
+Sccache is a [Rust](https://www.rust-lang.org/) program. Building it requires `cargo` (and thus `rustc`). sccache currently requires **Rust 1.19**.
 
 We recommend you install Rust via [Rustup](https://rustup.rs/). The generated binaries can be built so that they are very portable, see [scripts/build-release.sh](scripts/build-release.sh). By default `sccache` supports a local disk cache. To build `sccache` with support for `S3` and/or `Redis` cache backends, add `--features=all` or select a specific feature by passing `s3`, `gcs`, and/or `redis`. Refer the [Cargo Documentation](http://doc.crates.io/manifest.html#the-features-section) for details.
 
@@ -51,7 +51,7 @@ Some notes about using `sccache` with [Jenkins](https://jenkins.io) are [here](d
 Storage Options
 ---------------
 
-sccache defaults to using local disk storage. You can set the `SCCACHE_DIR` environment variable to change the disk cache location. By default it will use a sensible location for the current platform: `~/.cache/sccache` on Linux, `%LOCALAPPDATA%\Mozilla\sccache` on Windows, `~/Library/Caches/sccache` on OS X.
+Sccache defaults to using local disk storage. You can set the `SCCACHE_DIR` environment variable to change the disk cache location. By default it will use a sensible location for the current platform: `~/.cache/sccache` on Linux, `%LOCALAPPDATA%\Mozilla\sccache` on Windows, `~/Library/Caches/sccache` on OS X.
 
 If you want to use S3 storage for the sccache cache, you need to set the `SCCACHE_BUCKET` environment variable to the name of the S3 bucket to use. You can use `AWS_ACCESS_KEY_ID` and `AWS_SECRET_ACCESS_KEY` to set the S3 credentials and if you need to override the default endpoint you can set `SCCACHE_ENDPOINT`. To connect to a minio storage for example you can set `SCCACHE_ENDPOINT=<ip>:<port>`.