fix deprecated age.limits -> age_limits in contact_matrix() calls

The dot notation age.limits was deprecated in favor of age_limits.
Update compare-interventions.Rmd (2 occurrences) and template.Rmd (3 occurrences).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: avallecam

episodes/compare-interventions.Rmd

@@ -16,7 +16,7 @@ polymod <- socialmixr::polymod
 contact_data <- socialmixr::contact_matrix(
   polymod,
   countries = "United Kingdom",
-  age.limits = c(0, 15, 65),
+  age_limits = c(0, 15, 65),
   symmetric = TRUE
 )
 
@@ -359,7 +359,7 @@ polymod <- socialmixr::polymod
 contact_data <- socialmixr::contact_matrix(
   survey = polymod,
   countries = "United Kingdom",
-  age.limits = c(0, 20, 40),
+  age_limits = c(0, 20, 40),
   symmetric = TRUE
 )
 # prepare contact matrix

episodes/template.Rmd

@@ -67,7 +67,7 @@ polymod <- socialmixr::polymod
 contact_data <- socialmixr::contact_matrix(
   polymod,
   countries = "United Kingdom",
-  age.limits = c(0, 20, 40),
+  age_limits = c(0, 20, 40),
   symmetric = TRUE
 )
 contact_data
@@ -82,7 +82,7 @@ polymod <- socialmixr::polymod
 contact_data <- socialmixr::contact_matrix(
   polymod,
   countries = "United Kingdom",
-  age.limits = c(0, 20, 40),
+  age_limits = c(0, 20, 40),
   symmetric = TRUE
 )
 contact_data
@@ -120,7 +120,7 @@ polymod <- socialmixr::polymod
 contact_data <- socialmixr::contact_matrix(
   polymod,
   countries = "Poland",
-  age.limits = c(0, 15, 50),
+  age_limits = c(0, 15, 50),
   symmetric = TRUE
 )
 contact_data