[dpdk-web] [PATCH] add slack workspace

[Ferruh Yigit]

DPDK slack workspace is: https://dpdkproject.slack.com/

Added invitation link to the webpage.

Signed-off-by: Ferruh Yigit <ferruh.yigit at intel.com>
---
 content/contribute/_index.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/content/contribute/_index.md b/content/contribute/_index.md
index 2c9e141072f1..139cca0d4a81 100644
--- a/content/contribute/_index.md
+++ b/content/contribute/_index.md
@@ -14,7 +14,8 @@ and integrated during a [cycle started by a merge window](/roadmap/#cycle).
 
 Bugs are open in [bugzilla](https://bugs.dpdk.org/buglist.cgi?bug_status=__open__&product=DPDK).
 
-Some work synchronization may happen via IRC, on Libera.Chat channel #DPDK.
+Some work synchronization may happen via IRC, on Libera.chat channel #DPDK,
+or on [slack dpdkproject workspace](https://join.slack.com/t/dpdkproject/shared_invite/zt-v6c9ef5z-FqgOAS7BDAYqev_a~pbXdw).
 
 ## Licenses {#licenses}
 ---
-- 
2.31.1