Update CHANGELOG and increase version to 1.7.5

CHANGELOG.md

 # Changelog
 
+## [0.7.5]
+
+- Add Jitsi and Mattermost metadata for use as custom apps.
+
 ## [0.7.4]
 
 - Make the sign-in UI less wide.

deployment/helmchart/CHANGELOG.md

 # Changelog
 
+## [1.7.5]
+
+* Update dashboard to version 0.7.5.
+
 ## [1.7.4]
 
 * Update dashboard to version 0.7.4.

deployment/helmchart/Chart.yaml

 annotations:
   category: Dashboard
 apiVersion: v2
-appVersion: 0.7.4
+appVersion: 0.7.5
 dependencies:
   - name: common
     # https://artifacthub.io/packages/helm/bitnami/common
@@ -23,4 +23,4 @@ name: stackspin-dashboard
 sources:
   - https://open.greenhost.net/stackspin/dashboard/
   - https://open.greenhost.net/stackspin/dashboard-backend/
-version: 1.7.4
+version: 1.7.5

deployment/helmchart/values.yaml

@@ -68,7 +68,7 @@ dashboard:
   image:
     registry: open.greenhost.net:4567
     repository: stackspin/dashboard/dashboard
-    tag: 0.7.4
+    tag: 0.7.5
     digest: ""
     ## Optionally specify an array of imagePullSecrets.
     ## Secrets must be manually created in the namespace.
@@ -236,7 +236,7 @@ backend:
   image:
     registry: open.greenhost.net:4567
     repository: stackspin/dashboard/dashboard-backend
-    tag: 0.7.4
+    tag: 0.7.5
     digest: ""
     ## Optionally specify an array of imagePullSecrets.
     ## Secrets must be manually created in the namespace.
@@ -723,7 +723,7 @@ tests:
   image:
     registry: open.greenhost.net:4567
     repository: stackspin/dashboard/cypress-test
-    tag: 0.7.4
+    tag: 0.7.5
     pullPolicy: IfNotPresent
   credentials:
     user: ""