Minor update to the release doc (#81)

* Minor update to the release doc

The source release for 2.6.0 was still lying around when I generated the
client for 2.6.1 and was committed. Also removing it in this update

* fixup! Minor update to the release doc
diff --git a/apache-airflow-client-2.6.0-source.tar.gz b/apache-airflow-client-2.6.0-source.tar.gz
deleted file mode 100644
index a0c9ec3..0000000
--- a/apache-airflow-client-2.6.0-source.tar.gz
+++ /dev/null
Binary files differ
diff --git a/dev/README_RELEASE_CLIENT.md b/dev/README_RELEASE_CLIENT.md
index f9aea1b..b582e8a 100644
--- a/dev/README_RELEASE_CLIENT.md
+++ b/dev/README_RELEASE_CLIENT.md
@@ -110,7 +110,8 @@
 - Tarball the repo
 
     ```shell script
-    git archive --format=tar.gz ${VERSION} --prefix=apache-airflow-client-${VERSION_WITHOUT_RC}/ -o apache-airflow-client-${VERSION_WITHOUT_RC}-source.tar.gz
+    mkdir dist
+    git archive --format=tar.gz ${VERSION} --prefix=apache-airflow-client-${VERSION_WITHOUT_RC}/ -o dist/apache-airflow-client-${VERSION_WITHOUT_RC}-source.tar.gz
     ```
 
 - Generate sdist
@@ -225,16 +226,16 @@
 cat <<EOF
 Hey fellow Airflowers,
 
-I have cut the first release candidate for the Airflow Python Client ${VERSION}.
+I have cut the release candidate for the Airflow Python Client ${VERSION}.
 The client consists of APIs corresponding to REST APIs available in
 *Apache Airflow ${AIRFLOW_VERSION}*. This email is calling for a vote on
 the release, which will last for 72 hours. Consider this my (binding) +1.
 
 Airflow Client ${VERSION} is available at:
-https://dist.apache.org/repos/dist/dev/airflow/clients/python/${VERSION}/
+https://dist.apache.org/repos/dist/dev/airflow/clients/python/$VERSION/
 
 Or also available at PyPI:
-https://pypi.org/project/apache-airflow-client/${VERSION}/
+https://pypi.org/project/apache-airflow-client/$VERSION/
 
 *apache-airflow-client-${VERSION}-source.tar.gz* is a source release that comes with
 INSTALL instructions.