vela: Update PyPi documenation tag

 - Changed the tag to 3.0.0

Signed-off-by: Tim Hall <tim.hall@arm.com>
Change-Id: I309fcaa76c6595ca08c39b27a0fc3cf58b40dd52
diff --git a/setup.py b/setup.py
index 81a6c00..29198a1 100644
--- a/setup.py
+++ b/setup.py
@@ -40,7 +40,7 @@
 this_directory = os.path.abspath(os.path.dirname(__file__))
 with open(os.path.join(this_directory, "README.md"), encoding="utf-8") as f:
     long_description = f.read()
-    tag = "2.1.1"
+    tag = "3.0.0"
     url = f"https://review.mlplatform.org/plugins/gitiles/ml/ethos-u/ethos-u-vela/+/refs/tags/{tag}/"
     # Find all markdown links that match the format:  [text](link)
     for match, link in re.findall(r"(\[.+?\]\((.+?)\))", long_description):