Reduce dependabot frequency

Author: acoburn

.github/dependabot.yml

@@ -3,7 +3,8 @@ updates:
   - package-ecosystem: "maven"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "cron"
+      cronjob: "30 4 1,15 * *"
     ignore:
       - dependency-name: "org.eclipse.rdf4j:rdf4j-*"
       - dependency-name: "org.springframework.security:spring-*"
@@ -24,27 +25,30 @@ updates:
   - package-ecosystem: "maven"
     directory: "/rdf4j/"
     schedule:
-      interval: "weekly"
+      interval: "cron"
+      cronjob: "15 4 1,15 * *"
     allow:
       - dependency-name: "org.eclipse.rdf4j:rdf4j-*"
 
   - package-ecosystem: "maven"
     directory: "/spring/"
     schedule:
-      interval: "weekly"
+      interval: "cron"
+      cronjob: "45 4 1,15 * *"
     allow:
       - dependency-name: "org.springframework.security:spring-*"
 
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"
 
 # 1.2 Maintenance
   - package-ecosystem: "maven"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "cron"
+      cronjob: "30 4 1,15 * *"
     target-branch: "1.2"
     ignore:
       - dependency-name: "org.eclipse.rdf4j:rdf4j-*"
@@ -69,7 +73,8 @@ updates:
   - package-ecosystem: "maven"
     directory: "/rdf4j/"
     schedule:
-      interval: "weekly"
+      interval: "cron"
+      cronjob: "30 4 1,15 * *"
     target-branch: "1.2"
     allow:
       - dependency-name: "org.eclipse.rdf4j:rdf4j-*"
@@ -80,7 +85,8 @@ updates:
   - package-ecosystem: "maven"
     directory: "/spring/"
     schedule:
-      interval: "weekly"
+      interval: "cron"
+      cronjob: "30 4 1,15 * *"
     target-branch: "1.2"
     allow:
       - dependency-name: "org.springframework.security:spring-*"
@@ -91,7 +97,8 @@ updates:
   - package-ecosystem: "gradle"
     directory: "/gradle/"
     schedule:
-      interval: "weekly"
+      interval: "cron"
+      cronjob: "30 4 1,15 * *"
     target-branch: "1.2"
     labels:
       - "backport"
@@ -100,7 +107,7 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"
     target-branch: "1.2"
     labels:
       - "backport"
@@ -110,7 +117,8 @@ updates:
   - package-ecosystem: "maven"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "cron"
+      cronjob: "30 4 1,15 * *"
     target-branch: "1.3"
     ignore:
       - dependency-name: "org.eclipse.rdf4j:rdf4j-*"
@@ -135,7 +143,8 @@ updates:
   - package-ecosystem: "maven"
     directory: "/rdf4j/"
     schedule:
-      interval: "weekly"
+      interval: "cron"
+      cronjob: "30 4 1,15 * *"
     target-branch: "1.3"
     allow:
       - dependency-name: "org.eclipse.rdf4j:rdf4j-*"
@@ -146,7 +155,8 @@ updates:
   - package-ecosystem: "maven"
     directory: "/spring/"
     schedule:
-      interval: "weekly"
+      interval: "cron"
+      cronjob: "30 4 1,15 * *"
     target-branch: "1.3"
     allow:
       - dependency-name: "org.springframework.security:spring-*"
@@ -157,7 +167,7 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"
     target-branch: "1.3"
     labels:
       - "backport"