Remove dead MIT gpg site and fix release command (#294)

Author: Superskyyy

Makefile

@@ -130,6 +130,6 @@ clean:
 
 .PHONY: release
 release: clean lint license
-	-tar -zcvf skywalking-python-src-$(VERSION).tgz --exclude .venv *
-	gpg --batch --yes --armor --detach-sig skywalking-python-src-$(VERSION).tgz
-	shasum -a 512 skywalking-python-src-$(VERSION).tgz > skywalking-python-src-$(VERSION).tgz.sha512
+	tar -zcvf skywalking-python-src-$VERSION.tgz --exclude .venv *
+	gpg --batch --yes --armor --detach-sig skywalking-python-src-$VERSION.tgz
+	shasum -a 512 skywalking-python-src-$VERSION.tgz > skywalking-python-src-$VERSION.tgz.sha512

docs/en/contribution/How-to-release.md

@@ -7,14 +7,11 @@ This documentation guides the release manager to release the SkyWalking Python i
 1. Close (if finished, or move to next milestone otherwise) all issues in the current milestone from [skywalking-python](https://github.com/apache/skywalking-python/milestones) and [skywalking](https://github.com/apache/skywalking/milestones), create a new milestone if needed.
 2. Update CHANGELOG.md and `version` in `pyproject.toml`.
 
-
-## Add your GPG public key to Apache svn
-
-1. Upload your GPG public key to a public GPG site, such as [MIT's site](http://pgp.mit.edu:11371/). 
+## Add your GPG public key to Apache SVN
 
 1. Log in [id.apache.org](https://id.apache.org/) and submit your key fingerprint.
 
-1. Add your GPG public key into [SkyWalking GPG KEYS](https://dist.apache.org/repos/dist/release/skywalking/KEYS) file, **you can do this only if you are a PMC member**.  You can ask a PMC member for help. **DO NOT override the existed `KEYS` file content, only append your key at the end of the file.**
+2. Add your GPG public key into [SkyWalking GPG KEYS](https://dist.apache.org/repos/dist/release/skywalking/KEYS) file, **you can do this only if you are a PMC member**.  You can ask a PMC member for help. **DO NOT override the existed `KEYS` file content, only append your key at the end of the file.**
 
 
 ## Build and sign the source code package
@@ -29,7 +26,7 @@ git push --tags
 make clean && make release
 ```
 
-## Upload to Apache svn
+## Upload to Apache SVN
 
 ```bash
 svn co https://dist.apache.org/repos/dist/dev/skywalking/python release/skywalking/python