fix(go): always update version symlink on cycle upgrade

The go1.XX symlink (e.g. go1.25 -> go1.25.8) was only created when
it didn't exist. On patch upgrades the stale symlink was preserved,
so go1.25 still pointed at go1.25.7 after installing go1.25.8,
causing the upgrade to appear failed (version unchanged).

Change the condition from [ ! -e ] to unconditional ln -sf.

Signed-off-by: Sebastian Mendel <sebastian.mendel@netresearch.de>
Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>

Author: CybotTM

scripts/install_go.sh

@@ -70,11 +70,11 @@ install_go() {
         echo "Downloading Go ${FULL_VERSION} SDK..."
         "$FULL_BINARY" download || true
 
-        # Create symlink from go1.24 -> go1.24.12 for convenience
+        # Update symlink from go1.24 -> go1.24.12
         GOBIN="$(go env GOPATH)/bin"
-        if [ -x "$GOBIN/$FULL_BINARY" ] && [ ! -e "$GOBIN/$BINARY" ]; then
+        if [ -x "$GOBIN/$FULL_BINARY" ]; then
           ln -sf "$FULL_BINARY" "$GOBIN/$BINARY" 2>/dev/null || true
-          echo "Created symlink: $BINARY -> $FULL_BINARY"
+          echo "Updated symlink: $BINARY -> $FULL_BINARY"
         fi
       fi
     else