Bump version to 2.7.6

Fix aiohttp/apache http2 bug in ?muf and ?fof2

CHANGELOG.md

@@ -7,6 +7,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## [Unreleased]
 
 
+## [2.7.6] - 2022-06-13
+### Fixed
+- Issue where `?muf` and `?fof2` would fail with an aiohttp error.
+
+
 ## [2.7.5] - 2022-06-08
 ### Changed
 - Bumped ctyparser to 2.2.1.
@@ -219,7 +224,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## 1.0.0 - 2019-07-31 [YANKED]
 
 
-[Unreleased]: https://github.com/miaowware/qrm2/compare/v2.7.5...HEAD
+[Unreleased]: https://github.com/miaowware/qrm2/compare/v2.7.6...HEAD
+[2.7.6]: https://github.com/miaowware/qrm2/releases/tag/v2.7.6
 [2.7.5]: https://github.com/miaowware/qrm2/releases/tag/v2.7.5
 [2.7.4]: https://github.com/miaowware/qrm2/releases/tag/v2.7.4
 [2.7.3]: https://github.com/miaowware/qrm2/releases/tag/v2.7.3

exts/propagation.py

@@ -33,7 +33,7 @@ class PropagationCog(commands.Cog):
     async def mufmap(self, ctx: commands.Context):
         """Shows a world map of the Maximum Usable Frequency (MUF)."""
         async with ctx.typing():
-            async with self.session.get(self.muf_url) as r:
+            async with self.session.get(self.muf_url, headers={"Connection": "Upgrade", "Upgrade": "http/1.1"}) as r:
                 svg = await r.read()
             out = BytesIO(cairosvg.svg2png(bytestring=svg))
             file = discord.File(out, "muf_map.png")
@@ -47,7 +47,7 @@ class PropagationCog(commands.Cog):
     async def fof2map(self, ctx: commands.Context):
         """Shows a world map of the Critical Frequency (foF2)."""
         async with ctx.typing():
-            async with self.session.get(self.fof2_url) as r:
+            async with self.session.get(self.fof2_url,  headers={"Connection": "Upgrade", "Upgrade": "http/1.1"}) as r:
                 svg = await r.read()
             out = BytesIO(cairosvg.svg2png(bytestring=svg))
             file = discord.File(out, "fof2_map.png")

info.py

@@ -14,5 +14,5 @@ contributing = """Check out the [source on GitHub](https://github.com/miaowware/
 
                All issues and requests related to resources (including maps, band charts, data) should be added \
                in [miaowware/qrm-resources](https://github.com/miaowware/qrm-resources)."""
-release = "2.7.5"
+release = "2.7.6"
 bot_server = "https://discord.gg/Ntbg3J4"