Bump version to 0.34.0-dev (#4713)

|      PR 2:
| - add changelog-dev.md, add changelog-dev reference to
release_notes.md,
|     - bump version to 0.X+1.0-dev
| - Update rc_sync.yml to replace the previous release manager with your
username as a PR reviewer on the last line

doc/development/release_notes.md

@@ -3,6 +3,8 @@ Release notes
 
 This page contains the release notes for PennyLane.
 
+.. mdinclude:: ../releases/changelog-dev.md
+
 .. mdinclude:: ../releases/changelog-0.33.0.md
 
 .. mdinclude:: ../releases/changelog-0.32.0.md

doc/releases/changelog-dev.md

@@ -0,0 +1,19 @@
+:orphan:
+
+# Release 0.34.0-dev (development release)
+
+<h3>New features since last release</h3>
+
+<h3>Improvements 🛠</h3>
+
+<h3>Breaking changes 💔</h3>
+
+<h3>Deprecations 👋</h3>
+
+<h3>Documentation 📝</h3>
+
+<h3>Bug fixes 🐛</h3>
+
+<h3>Contributors ✍️</h3>
+
+This release contains contributions from (in alphabetical order):

pennylane/_version.py

@@ -16,4 +16,4 @@
 Version number (major.minor.patch[-label])
 """
 
-__version__ = "0.33.0"
+__version__ = "0.34.0-dev"