Escape operator to fix build

Signed-off-by: Samreet Singh <samreet.singh@iteratec.com>

Author: Reet00

documentation/docs/10-security.md

@@ -18,7 +18,7 @@ is roughly every four weeks (we will usually make a new release after each sprin
 | ------- | ------------------ | ------------------ |
 | 5.x.x | :white_check_mark: | :white_check_mark: |
 | 4.16.x | Critical issues only | :x: |
-| <= 3.15.x | :x: | :x: |
+| \<= 3.15.x | :x: | :x: |
 
 ### Major Release (Semver)
 _Upcoming major updates_ will come with a time window in which both _major versions_ (starting with v2.x.x)