add happy hour 034: slides & recording

Author: Richard Top

docs/training-events/2026/EESSI-happyhour-2026-015-host_injections.pdf

@@ -2,6 +2,18 @@
 
 Find slides, and video recordings of earlier sessions below.
 
+---
+
+# Topic series: EESSI Mix and Match
+
+### Monday 08 June 2026
+
+**Outline:** Site- Specific Tweaks with `host_injections`
+([Slides (PDF)](EESSI-happyhour-2026-015-host_injections.pdf), [Recording (YouTube)](https://youtu.be/0vD0_nJsLBo))
+
+<iframe width="560" height="315" src="https://www.youtube.com/embed/0vD0_nJsLBo?si=kbNYyvO-SiOFtQQq" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+
+
 ---
 
 # Topic series: CI/CD Workflows with EESSI

docs/training-events/2026/happy-hours-previous-sessions.md

@@ -31,15 +31,14 @@ If you haven't joined the EESSI Slack yet, [click here to join]({{ config.extra.
 
 ---
 
-### 💡 **Next session**: Site-Specific Tweaks with `host_injections`
+### 💡 **Next session**: AMD ROCm support in EESSI
 ### Topic Series: EESSI Mix and Match 
 🗓️ Schedule
-#### Monday 8 June 2026, 14:00-15:00 CE(S)T
+#### Monday 15 June 2026, 14:00-15:00 CE(S)T
 
 ---
 
 ### Upcoming sessions:
-- 15 June 2026 - AMD ROCm support in EESSI
 - 22 June 2026 - revisit the EESSI bot 🤖  
 - 29 June 2026 - Report on EESSI activities @ ISC'26
 
@@ -51,6 +50,10 @@ If you haven't joined the EESSI Slack yet, [click here to join]({{ config.extra.
 
 See the full Recordings, slides, and materials here: [Previous Sessions & Videos](2026/happy-hours-previous-sessions.md)
 
+*Topic series: EESSI Mix and Match*
+
+- 08 June 2026 - [Site-Specific Tweaks with `host_injections`](https://youtu.be/0vD0_nJsLBo)
+
 *Topic series: CI/CD Workflows with EESSI*
 
 - 20 April 2026 - [CI/CD Workflows with EESSI](https://youtu.be/1kcLQLHt21k)