adds blog post for Keyspace save the date (#300)

### Description

Adds a blog post about the upcoming Valkey conference.
 
### Issues Resolved

n/a

### Check List
- [x] Commits are signed per the DCO using `--signoff`

By submitting this pull request, I confirm that my contribution is made
under the terms of the BSD-3-Clause License.

---------

Signed-off-by: Kyle J. Davis <[email protected]>

Author: stockholmux

content/blog/2025-07-10-keyspace-save-the-date.md

@@ -0,0 +1,22 @@
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+title = "Save the Date August 28, 2025: Keyspace"
+description = "Join the Valkey crew on August 28, 2025 in Amsterdam for the first ever Valkey conference: Keyspace!"
+date = "2025-07-10 01:01:01"
+authors= [ "kyledvs"]
+[extra]
+featured = true
+featured_image = "/assets/media/featured/random-05.webp"
++++
+
+Join the Valkey crew on August 28, 2025 in Amsterdam for the first ever Valkey conference: Keyspace!
+
+Keyspace is the event where developers, SREs, and DevOps pros gather to share techniques, best practices, and new uses for Valkey.
+You’ll meet and network with the project maintainers, community enthusiasts, and thought leaders in a focused one-day event.
+The event will give insights into the project through general sessions, breakout rooms, lightning talks, and a workshop, in two distinct orbits (aka "tracks" if you want to be boring).  
+
+Breakfast, lunch, happy hour, and exclusive Valkey swag is included.
+
+Keyspace is being held in conjunction with the [Linux Foundation Open Source Summit Europe](https://events.linuxfoundation.org/open-source-summit-europe/) at the [RAI Amsterdam Convention Centre](https://www.rai.nl/en).
+Tickets for Open Source Summit are not required to attend Keyspace.
+
+Tickets available soon.