Fix missing metainfo on some views

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/views/About/AboutInstance.vue

@@ -135,6 +135,15 @@ import langs from "../../i18n/langs.json";
   components: {
     InstanceContactLink,
   },
+  metaInfo() {
+    return {
+      title: this.$t("About {instance}", {
+        // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+        // @ts-ignore
+        instance: this?.config?.name,
+      }) as string,
+    };
+  },
 })
 export default class AboutInstance extends Vue {
   config!: IConfig;

js/src/views/About/Glossary.vue

@@ -73,6 +73,11 @@ import { IConfig } from "../../types/config.model";
   apollo: {
     config: ABOUT,
   },
+  metaInfo() {
+    return {
+      title: this.$t("Glossary") as string,
+    };
+  },
 })
 export default class Glossary extends Vue {
   config!: IConfig;

js/src/views/About/Privacy.vue

@@ -29,6 +29,11 @@ import { InstancePrivacyType } from "@/types/enums";
       },
     },
   },
+  metaInfo() {
+    return {
+      title: this.$t("Privacy Policy") as string,
+    };
+  },
 })
 export default class Privacy extends Vue {
   config!: IConfig;

js/src/views/About/Rules.vue

@@ -18,6 +18,11 @@ import RouteName from "../../router/name";
       query: RULES,
     },
   },
+  metaInfo() {
+    return {
+      title: this.$t("Rules") as string,
+    };
+  },
 })
 export default class Rules extends Vue {
   config!: IConfig;

js/src/views/About/Terms.vue

@@ -25,6 +25,11 @@ import { InstanceTermsType } from "@/types/enums";
       },
     },
   },
+  metaInfo() {
+    return {
+      title: this.$t("Terms") as string,
+    };
+  },
 })
 export default class Terms extends Vue {
   config!: IConfig;