[ci skip] More badges and things to README.md (#5338)

* Update README.md

* Update README.md

Remove license badge and fix letters

* Update README.md

* Update README.md

Many many time in this PR... now pass to java 16

* Update README.md

Add discord badge

* Update README.md

Fix format

* Update README.md

Change url to patches (because Spigot-API-Patches change)

* Update README.md

* Update README.md

Apply suggest url to patches

Co-authored-by: Olivia <chew@chew.pw>

* Update README.md

Update paper version from 1.17 to 1.17.1

* Update README.md

A better badge for discord (IRC not have a custom badge or any...)

* Update README.md

Update style.

Co-authored-by: Olivia <chew@chew.pw>

README.md

@@ -1,4 +1,5 @@
-Paper ![GitHub Workflow Status (branch)](https://img.shields.io/github/workflow/status/PaperMC/Paper/Build%20Paper/master)
+Paper ![GitHub Workflow Status (branch)](https://img.shields.io/github/workflow/status/PaperMC/Paper/Build%20Paper/master) ![Read the Docs (version)](https://img.shields.io/readthedocs/paper/latest) ![version](https://img.shields.io/badge/version-1.17.1-9fc) ![Sonatype Nexus (Query Options)](https://img.shields.io/nexus/maven-snapshots/io.papermc.paper/paper-api?label=repo&server=https%3A%2F%2Fpapermc.io%2Frepo) 
+[![Discord](https://img.shields.io/discord/289587909051416579.svg?label=&logo=discord&logoColor=ffffff&color=7389D8&labelColor=6A7EC2)](https://discord.gg/papermc)
 ===========
 
 High performance Spigot fork that aims to fix gameplay and mechanics inconsistencies.
@@ -21,7 +22,7 @@ Run the Paperclip jar directly from your server. Just like old times
 
 How To (Plugin Developers)
 ------
- * See our API patches [here](Spigot-API-Patches)
+ * See our API patches [here](patches/api)
  * See upcoming, pending, and recently added API [here](https://github.com/PaperMC/Paper/projects/6)
  * Paper API javadocs here: [papermc.io/javadocs](https://papermc.io/javadocs/)
  * Maven Repo (for paper-api):
@@ -36,7 +37,7 @@ How To (Plugin Developers)
 <dependency>
     <groupId>io.papermc.paper</groupId>
     <artifactId>paper-api</artifactId>
-    <version>1.17-R0.1-SNAPSHOT</version>
+    <version>1.17.1-R0.1-SNAPSHOT</version>
     <scope>provided</scope>
 </dependency>
  ```
@@ -54,7 +55,7 @@ repositories {
  * Artifact:
 ```groovy
 dependencies {
-    compileOnly 'io.papermc.paper:paper-api:1.17-R0.1-SNAPSHOT'
+    compileOnly 'io.papermc.paper:paper-api:1.17.1-R0.1-SNAPSHOT'
 }
 ```