release: v6.1.6

Bumps clientversion from 6.1.5 to 6.1.6 and updates all packaging
metadata (deb, rpm, docker, snap, flatpak, winget, scoop, appimage,
root Dockerfile) to match. Adds a v6.1.6 section to CHANGELOG.md
documenting the conditional Overview Total label and the 3-tier
amount-column color rule that landed in this release. Restores the
historic v6.1.5 entry in triangles.spec's %changelog after the bulk
sed bumped it incorrectly.

snap/snapcraft.yaml

@@ -1,6 +1,6 @@
 name: triangles
 base: core22
-version: '6.1.5'
+version: '6.1.6'
 summary: Cryptographic Triangles (TRI) cryptocurrency wallet
 description: |
   Privacy-focused cryptocurrency featuring Proof-of-Stake consensus,
@@ -51,10 +51,10 @@ apps:
 parts:
   triangles:
     plugin: dump
-    source: https://github.com/SamiAhmed7777/triangles_v5/releases/download/v6.1.5/Cryptographic-Triangles-v6.1.5-linux-x64-qt
+    source: https://github.com/SamiAhmed7777/triangles_v5/releases/download/v6.1.6/Cryptographic-Triangles-v6.1.6-linux-x64-qt
     source-type: file
     organize:
-      Cryptographic-Triangles-v6.1.5-linux-x64-qt: bin/triangles-qt
+      Cryptographic-Triangles-v6.1.6-linux-x64-qt: bin/triangles-qt
     stage-packages:
       - libqt5widgets5
       - libqt5gui5
@@ -73,10 +73,10 @@ parts:
 
   trianglesd:
     plugin: dump
-    source: https://github.com/SamiAhmed7777/triangles_v5/releases/download/v6.1.5/Cryptographic-Triangles-v6.1.5-linux-x64-daemon
+    source: https://github.com/SamiAhmed7777/triangles_v5/releases/download/v6.1.6/Cryptographic-Triangles-v6.1.6-linux-x64-daemon
     source-type: file
     organize:
-      Cryptographic-Triangles-v6.1.5-linux-x64-daemon: bin/trianglesd
+      Cryptographic-Triangles-v6.1.6-linux-x64-daemon: bin/trianglesd
 
   desktop-entry:
     plugin: dump