[Glitch] Fix autosuggestions overstaying their welcome in languages that don't use spaces

Port 8d8b9c84a41b0b7e22822ed49ed58e77da2970ef to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/utils/hashtags.ts

@@ -1,5 +1,5 @@
 const HASHTAG_SEPARATORS = '_\\u00b7\\u200c';
-const ALPHA = '\\p{L}\\p{M}';
+export const ALPHA = '\\p{L}\\p{M}';
 export const WORD = '\\p{L}\\p{M}\\p{N}\\p{Pc}';
 
 const buildHashtagPatternRegex = () => {