Suppress auto-trigger for PR jobs

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
Change-Id: Ife581bb5994a880f2c914c047c47a0ab81326969
diff --git a/mbed-tls-pr-head.yaml b/mbed-tls-pr-head.yaml
index 630790e..168cb51 100644
--- a/mbed-tls-pr-head.yaml
+++ b/mbed-tls-pr-head.yaml
@@ -45,6 +45,7 @@
         property-strategies:
           all-branches:
           - pipeline-branch-durability-override: performance-optimized
+          - suppress-scm-triggering: true
         submodule:
           disable: false
           recursive: true
diff --git a/mbed-tls-pr-merge.yaml b/mbed-tls-pr-merge.yaml
index a9fd447..99032cd 100644
--- a/mbed-tls-pr-merge.yaml
+++ b/mbed-tls-pr-merge.yaml
@@ -45,6 +45,7 @@
         property-strategies:
           all-branches:
           - pipeline-branch-durability-override: performance-optimized
+          - suppress-scm-triggering: true
         submodule:
           disable: false
           recursive: true