Merge pull request #198 from hashicorp/changelog/0.7.4

Fix changelog for v0.7.4

Author: marianoasselborn

CHANGELOG.md

@@ -1,7 +1,9 @@
-## 0.7.3 (15 May 2023)
-
-Initial release
+## 0.7.4 (Jun 6, 2023)
 
 BUG FIXES
 
-- client: fixing an issue where the Content-Type header wouldn't be sent with an empty payload when using HTTP2 [GH-194]
+- client: fixing an issue where the Content-Type header wouldn't be sent with an empty payload when using HTTP/2 [GH-194]
+
+## 0.7.3 (May 15, 2023)
+
+Initial release