Don't let a failed index.html backup block the injection

On linuxserver/jellyfin the web folder belongs to root, so copying
index.html to index.html.sharelinks.bak threw even when index.html itself
was writable, and the ShareLink action never got injected. The backup is
best-effort now.

Bump to 1.0.7.0.

Jellyfin.Plugin.ShareLinks/Jellyfin.Plugin.ShareLinks.csproj

@@ -6,9 +6,9 @@
     <LangVersion>latest</LangVersion>
     <RootNamespace>Jellyfin.Plugin.ShareLinks</RootNamespace>
     <AssemblyName>Jellyfin.Plugin.ShareLinks</AssemblyName>
-    <Version>1.0.6.0</Version>
-    <AssemblyVersion>1.0.6.0</AssemblyVersion>
-    <FileVersion>1.0.6.0</FileVersion>
+    <Version>1.0.7.0</Version>
+    <AssemblyVersion>1.0.7.0</AssemblyVersion>
+    <FileVersion>1.0.7.0</FileVersion>
     <GenerateAssemblyInfo>true</GenerateAssemblyInfo>
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
     <ImplicitUsings>disable</ImplicitUsings>