Update the README plot (#177)

## What Changed?

Updates the title and annotations in the README performance plot

## Why Does It Need To?

Makes the language clearer

## Checklist

- [x] Above description has been filled out so that upon quash merge we
have a
  good record of what changed.
- [ ] New functions, methods, types are documented. Old documentation is
updated
  if necessary
- [ ] Documentation in Notion has been updated
- [ ] Tests for new behaviors are provided
  - [ ] New test suites (if any) ave been added to the CI tests (in
`.github/workflows/rust.yml`) either as compiler test or integration
test.
*Or* justification for their omission from CI has been provided in this
PR
    description.

Author: JustusAdam

README.md

@@ -47,8 +47,13 @@ Paralegal directly integrates with cargo and rustc, so running it is as easy as
 Paralegal is a fast cargo and rustc plugin that developers can run frequently
 (in CI for example) to find potential bugs as they develop their application.
 
-![](misc/ci_plot-3.png)
+Here is a performance breakdown plot of Paralegal running end-to-end on
+realistic web applications.
+
+![](misc/ci_plot.png)
 
 ## Installation and Usage
 
-To explain installation and usage we provide a [step-by-step guide](https://justus-adam.notion.site/Paralegal-Step-by-Step-40541156c25d48f8b6ad79a0e1b09b91) in our online documentation.
+To explain installation and usage we provide a [step-by-step
+guide](https://justus-adam.notion.site/Paralegal-Step-by-Step-40541156c25d48f8b6ad79a0e1b09b91)
+in our online documentation.